18951064164 has 36 divisors (see below), whose sum is σ = 47987154124. Its totient is φ = 6306066432.

The previous prime is 18951064147. The next prime is 18951064169. The reversal of 18951064164 is 46146015981.

18951064164 is a `hidden beast` number, since 18 + 9 + 510 + 64 + 1 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10720945764 + 8230118400 = 103542^2 + 90720^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (18951064169) 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, 435397 + ... + 476940.

Almost surely, 2^18951064164 is an apocalyptic number.

It is an amenable number.

18951064164 is an abundant number, since it is smaller than the sum of its proper divisors (29036089960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18951064164 is a wasteful number, since it uses less digits than its factorization.

18951064164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912924 (or 912919 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 18951064164 in words is "eighteen billion, nine hundred fifty-one million, sixty-four thousand, one hundred sixty-four".