64910454840 has 1440 divisors, whose sum is σ = 290600956800. Its totient is φ = 12933043200.

The previous prime is 64910454827. The next prime is 64910454841. The reversal of 64910454840 is 4845401946.

64910454840 is a `hidden beast` number, since 64 + 9 + 1 + 0 + 4 + 548 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64910454841) by changing a digit.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 595508706 + ... + 595508814.

It is an arithmetic number, because the mean of its divisors is an integer number (201806220).

Almost surely, 2^64910454840 is an apocalyptic number.

64910454840 is a gapful number since it is divisible by the number (60) 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 64910454840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145300478400).

64910454840 is an abundant number, since it is smaller than the sum of its proper divisors (225690501960).

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

64910454840 is a wasteful number, since it uses less digits than its factorization.

64910454840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 64910454840 in words is "sixty-four billion, nine hundred ten million, four hundred fifty-four thousand, eight hundred forty".