27553406556 has 24 divisors (see below), whose sum is σ = 69236765584. Its totient is φ = 8477971200.

The previous prime is 27553406533. The next prime is 27553406581. The reversal of 27553406556 is 65560435572.

It is a super-2 number, since 2×27553406556² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88312045 + ... + 88312356.

Almost surely, 2^27553406556 is an apocalyptic number.

27553406556 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

27553406556 is an abundant number, since it is smaller than the sum of its proper divisors (41683359028).

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

27553406556 is a wasteful number, since it uses less digits than its factorization.

27553406556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176624421 (or 176624419 counting only the distinct ones).

The product of its (nonzero) digits is 3780000, while the sum is 48.

The spelling of 27553406556 in words is "twenty-seven billion, five hundred fifty-three million, four hundred six thousand, five hundred fifty-six".