497805855661440 has 384 divisors, whose sum is σ = 1726830705600000. Its totient is φ = 132142831521792.

The previous prime is 497805855661409. The next prime is 497805855661447. The reversal of 497805855661440 is 44166558508794.

497805855661440 is a `hidden beast` number, since 4 + 9 + 7 + 8 + 0 + 5 + 8 + 5 + 566 + 14 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497805855661447) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3715484371 + ... + 3715618349.

It is an arithmetic number, because the mean of its divisors is an integer number (4496954962500).

Almost surely, 2^{497805855661440} is an apocalyptic number.

497805855661440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 497805855661440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863415352800000).

497805855661440 is an abundant number, since it is smaller than the sum of its proper divisors (1229024849938560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

497805855661440 is a wasteful number, since it uses less digits than its factorization.

497805855661440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136942 (or 136927 counting only the distinct ones).

The product of its (nonzero) digits is 1161216000, while the sum is 72.

The spelling of 497805855661440 in words is "four hundred ninety-seven trillion, eight hundred five billion, eight hundred fifty-five million, six hundred sixty-one thousand, four hundred forty".