497787142840 has 32 divisors (see below), whose sum is σ = 1206176539680. Its totient is φ = 183798329472.

The previous prime is 497787142813. The next prime is 497787142841. The reversal of 497787142840 is 48241787794.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (497787142841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478640964 + ... + 478642003.

It is an arithmetic number, because the mean of its divisors is an integer number (37693016865).

Almost surely, 2^497787142840 is an apocalyptic number.

497787142840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

497787142840 is an abundant number, since it is smaller than the sum of its proper divisors (708389396840).

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

497787142840 is a wasteful number, since it uses less digits than its factorization.

497787142840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957282991 (or 957282987 counting only the distinct ones).

The product of its (nonzero) digits is 25288704, while the sum is 61.

The spelling of 497787142840 in words is "four hundred ninety-seven billion, seven hundred eighty-seven million, one hundred forty-two thousand, eight hundred forty".