65457856026 has 64 divisors (see below), whose sum is σ = 147179410560. Its totient is φ = 21562329600.

The previous prime is 65457855977. The next prime is 65457856031. The reversal of 65457856026 is 62065875456.

65457856026 is a `hidden beast` number, since 6 + 5 + 4 + 5 + 78 + 560 + 2 + 6 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3662925 + ... + 3680751.

It is an arithmetic number, because the mean of its divisors is an integer number (2299678290).

Almost surely, 2^65457856026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65457856026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73589705280).

65457856026 is an abundant number, since it is smaller than the sum of its proper divisors (81721554534).

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

65457856026 is a wasteful number, since it uses less digits than its factorization.

65457856026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18636 (or 18630 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 65457856026 in words is "sixty-five billion, four hundred fifty-seven million, eight hundred fifty-six thousand, twenty-six".