27897511532 has 48 divisors (see below), whose sum is σ = 55942838784. Its totient is φ = 12048960000.

The previous prime is 27897511507. The next prime is 27897511541. The reversal of 27897511532 is 23511579872.

It is a super-2 number, since 2×27897511532² (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 15 ways as a sum of consecutive naturals, for example, 61532 + ... + 244092.

It is an arithmetic number, because the mean of its divisors is an integer number (1165475808).

Almost surely, 2^27897511532 is an apocalyptic number.

27897511532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

27897511532 is an abundant number, since it is smaller than the sum of its proper divisors (28045327252).

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

27897511532 is a wasteful number, since it uses less digits than its factorization.

27897511532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182750 (or 182748 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The spelling of 27897511532 in words is "twenty-seven billion, eight hundred ninety-seven million, five hundred eleven thousand, five hundred thirty-two".