35664779521 has 32 divisors (see below), whose sum is σ = 43150544640. Its totient is φ = 28795647744.

The previous prime is 35664779489. The next prime is 35664779531. The reversal of 35664779521 is 12597746653.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 35664779521 - 2⁵ = 35664779489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (35664779531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23887251 + ... + 23888743.

It is an arithmetic number, because the mean of its divisors is an integer number (1348454520).

Almost surely, 2^35664779521 is an apocalyptic number.

It is an amenable number.

35664779521 is a deficient number, since it is larger than the sum of its proper divisors (7485765119).

35664779521 is a wasteful number, since it uses less digits than its factorization.

35664779521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425.

The product of its digits is 9525600, while the sum is 55.

The spelling of 35664779521 in words is "thirty-five billion, six hundred sixty-four million, seven hundred seventy-nine thousand, five hundred twenty-one".