64605655641 has 16 divisors (see below), whose sum is σ = 89197637760. Its totient is φ = 41544935040.

The previous prime is 64605655573. The next prime is 64605655661. The reversal of 64605655641 is 14655650646.

It is not a de Polignac number, because 64605655641 - 2¹⁸ = 64605393497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64605655661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269565 + ... + 449306.

It is an arithmetic number, because the mean of its divisors is an integer number (5574852360).

Almost surely, 2^64605655641 is an apocalyptic number.

It is an amenable number.

64605655641 is a deficient number, since it is larger than the sum of its proper divisors (24591982119).

64605655641 is a wasteful number, since it uses less digits than its factorization.

64605655641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719936.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 64605655641 in words is "sixty-four billion, six hundred five million, six hundred fifty-five thousand, six hundred forty-one".