64731287462436 has 144 divisors (see below), whose sum is σ = 208422721503360. Its totient is φ = 16490588912640.

The previous prime is 64731287462381. The next prime is 64731287462459. The reversal of 64731287462436 is 63426478213746.

64731287462436 is a `hidden beast` number, since 6 + 4 + 7 + 3 + 128 + 7 + 462 + 43 + 6 = 666.

It is a super-2 number, since 2×64731287462436² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 397550475 + ... + 397713266.

It is an arithmetic number, because the mean of its divisors is an integer number (1447380010440).

Almost surely, 2^{64731287462436} is an apocalyptic number.

It is an amenable number.

64731287462436 is an abundant number, since it is smaller than the sum of its proper divisors (143691434040924).

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

64731287462436 is a wasteful number, since it uses less digits than its factorization.

64731287462436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795263794 (or 795263789 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 63.

The spelling of 64731287462436 in words is "sixty-four trillion, seven hundred thirty-one billion, two hundred eighty-seven million, four hundred sixty-two thousand, four hundred thirty-six".