27099155631 has 24 divisors (see below), whose sum is σ = 38265258880. Its totient is φ = 17011771632.

The previous prime is 27099155627. The next prime is 27099155639. The reversal of 27099155631 is 13655199072.

It is not a de Polignac number, because 27099155631 - 2² = 27099155627 is a prime.

It is a super-2 number, since 2×27099155631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27099155639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1581150 + ... + 1598196.

Almost surely, 2^27099155631 is an apocalyptic number.

27099155631 is a deficient number, since it is larger than the sum of its proper divisors (11166103249).

27099155631 is a wasteful number, since it uses less digits than its factorization.

27099155631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17403 (or 17236 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 48.

The spelling of 27099155631 in words is "twenty-seven billion, ninety-nine million, one hundred fifty-five thousand, six hundred thirty-one".