27121533628 has 24 divisors (see below), whose sum is σ = 54253402112. Its totient is φ = 11621299824.

The previous prime is 27121533623. The next prime is 27121533653. The reversal of 27121533628 is 82633512172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27121533623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61825 + ... + 240967.

Almost surely, 2^27121533628 is an apocalyptic number.

27121533628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27121533628 is an abundant number, since it is smaller than the sum of its proper divisors (27131868484).

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

27121533628 is a wasteful number, since it uses less digits than its factorization.

27121533628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184561 (or 184559 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The spelling of 27121533628 in words is "twenty-seven billion, one hundred twenty-one million, five hundred thirty-three thousand, six hundred twenty-eight".