64975011858 has 12 divisors (see below), whose sum is σ = 140779192398. Its totient is φ = 21658337280.

The previous prime is 64975011817. The next prime is 64975011863. The reversal of 64975011858 is 85811057946.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41263015689 + 23711996169 = 203133^2 + 153987^2 .

It is a super-2 number, since 2×64975011858² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1804861423 + ... + 1804861458.

Almost surely, 2^64975011858 is an apocalyptic number.

64975011858 is an abundant number, since it is smaller than the sum of its proper divisors (75804180540).

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

64975011858 is a wasteful number, since it uses less digits than its factorization.

64975011858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609722889 (or 3609722886 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 64975011858 in words is "sixty-four billion, nine hundred seventy-five million, eleven thousand, eight hundred fifty-eight".