23621661064 has 16 divisors (see below), whose sum is σ = 45487658700. Its totient is φ = 11491618752.

The previous prime is 23621661053. The next prime is 23621661067. The reversal of 23621661064 is 46016612632.

It can be written as a sum of positive squares in 2 ways, for example, as 23304464964 + 317196100 = 152658^2 + 17810^2 .

It is a super-2 number, since 2×23621661064² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (23621661067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39901159 + ... + 39901750.

Almost surely, 2^23621661064 is an apocalyptic number.

It is an amenable number.

23621661064 is a deficient number, since it is larger than the sum of its proper divisors (21865997636).

23621661064 is a wasteful number, since it uses less digits than its factorization.

23621661064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79802952 (or 79802948 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 23621661064 in words is "twenty-three billion, six hundred twenty-one million, six hundred sixty-one thousand, sixty-four".