27312978100 has 36 divisors (see below), whose sum is σ = 60019422400. Its totient is φ = 10786894560.

The previous prime is 27312978067. The next prime is 27312978109. The reversal of 27312978100 is 187921372.

It is a happy number.

It is a super-2 number, since 2×27312978100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27312978109) 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, 1720770 + ... + 1736569.

Almost surely, 2^27312978100 is an apocalyptic number.

27312978100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27312978100 is an abundant number, since it is smaller than the sum of its proper divisors (32706444300).

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

27312978100 is a wasteful number, since it uses less digits than its factorization.

27312978100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3457432 (or 3457425 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 27312978100 in words is "twenty-seven billion, three hundred twelve million, nine hundred seventy-eight thousand, one hundred".