27731161628 has 12 divisors (see below), whose sum is σ = 48609486912. Its totient is φ = 13842736800.

The previous prime is 27731161621. The next prime is 27731161673. The reversal of 27731161628 is 82616113772.

It is a super-2 number, since 2×27731161628² (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 (27731161621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5708273 + ... + 5713128.

It is an arithmetic number, because the mean of its divisors is an integer number (4050790576).

Almost surely, 2^27731161628 is an apocalyptic number.

It is an amenable number.

27731161628 is a deficient number, since it is larger than the sum of its proper divisors (20878325284).

27731161628 is a wasteful number, since it uses less digits than its factorization.

27731161628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11422012 (or 11422010 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The spelling of 27731161628 in words is "twenty-seven billion, seven hundred thirty-one million, one hundred sixty-one thousand, six hundred twenty-eight".