27121078816 has 48 divisors (see below), whose sum is σ = 57940964928. Its totient is φ = 12421843200.

The previous prime is 27121078799. The next prime is 27121078849. The reversal of 27121078816 is 61887012172.

It is a super-2 number, since 2×27121078816² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194340 + ... + 303331.

It is an arithmetic number, because the mean of its divisors is an integer number (1207103436).

Almost surely, 2^27121078816 is an apocalyptic number.

27121078816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

27121078816 is an abundant number, since it is smaller than the sum of its proper divisors (30819886112).

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

27121078816 is a wasteful number, since it uses less digits than its factorization.

27121078816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497825 (or 497817 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 43.

The spelling of 27121078816 in words is "twenty-seven billion, one hundred twenty-one million, seventy-eight thousand, eight hundred sixteen".