64737987651 has 12 divisors (see below), whose sum is σ = 93512692728. Its totient is φ = 43157612544.

The previous prime is 64737987649. The next prime is 64737987659. The reversal of 64737987651 is 15678973746.

64737987651 is a `hidden beast` number, since 6 + 473 + 7 + 98 + 76 + 5 + 1 = 666.

64737987651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64737987651 - 2¹ = 64737987649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64737987659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 550036 + ... + 657278.

It is an arithmetic number, because the mean of its divisors is an integer number (7792724394).

Almost surely, 2^64737987651 is an apocalyptic number.

64737987651 is a deficient number, since it is larger than the sum of its proper divisors (28774705077).

64737987651 is a wasteful number, since it uses less digits than its factorization.

64737987651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174322 (or 174319 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 63.

The spelling of 64737987651 in words is "sixty-four billion, seven hundred thirty-seven million, nine hundred eighty-seven thousand, six hundred fifty-one".