27155436564 has 24 divisors (see below), whose sum is σ = 63365349600. Its totient is φ = 9051431584.

The previous prime is 27155436563. The next prime is 27155436571. The reversal of 27155436564 is 46563455172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27155436563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 538087 + ... + 586385.

It is an arithmetic number, because the mean of its divisors is an integer number (2640222900).

Almost surely, 2^27155436564 is an apocalyptic number.

It is an amenable number.

27155436564 is an abundant number, since it is smaller than the sum of its proper divisors (36209913036).

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

27155436564 is a wasteful number, since it uses less digits than its factorization.

27155436564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95159 (or 95157 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 48.

The spelling of 27155436564 in words is "twenty-seven billion, one hundred fifty-five million, four hundred thirty-six thousand, five hundred sixty-four".