64642460645 has 32 divisors (see below), whose sum is σ = 93916101888. Its totient is φ = 41697174528.

The previous prime is 64642460599. The next prime is 64642460653. The reversal of 64642460645 is 54606424646.

It is a cyclic number.

It is not a de Polignac number, because 64642460645 - 2¹⁶ = 64642395109 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64642460645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1161014 + ... + 1215416.

It is an arithmetic number, because the mean of its divisors is an integer number (2934878184).

Almost surely, 2^64642460645 is an apocalyptic number.

It is an amenable number.

64642460645 is a deficient number, since it is larger than the sum of its proper divisors (29273641243).

64642460645 is a wasteful number, since it uses less digits than its factorization.

64642460645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56429.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 64642460645 in words is "sixty-four billion, six hundred forty-two million, four hundred sixty thousand, six hundred forty-five".