64140251262 has 64 divisors (see below), whose sum is σ = 136038078720. Its totient is φ = 20104257024.

The previous prime is 64140251257. The next prime is 64140251297. The reversal of 64140251262 is 26215204146.

It is a super-2 number, since 2×64140251262² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 18152848 + ... + 18156380.

It is an arithmetic number, because the mean of its divisors is an integer number (2125594980).

Almost surely, 2^64140251262 is an apocalyptic number.

64140251262 is an abundant number, since it is smaller than the sum of its proper divisors (71897827458).

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

64140251262 is a wasteful number, since it uses less digits than its factorization.

64140251262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4697.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 64140251262 in words is "sixty-four billion, one hundred forty million, two hundred fifty-one thousand, two hundred sixty-two".