55611021156 has 48 divisors (see below), whose sum is σ = 130186135296. Its totient is φ = 18476054784.

The previous prime is 55611021143. The next prime is 55611021157. The reversal of 55611021156 is 65112011655.

It is not an unprimeable number, because it can be changed into a prime (55611021157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14341890 + ... + 14345766.

It is an arithmetic number, because the mean of its divisors is an integer number (2712211152).

Almost surely, 2^55611021156 is an apocalyptic number.

It is an amenable number.

55611021156 is an abundant number, since it is smaller than the sum of its proper divisors (74575114140).

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

55611021156 is a wasteful number, since it uses less digits than its factorization.

55611021156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7508 (or 7506 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 55611021156 in words is "fifty-five billion, six hundred eleven million, twenty-one thousand, one hundred fifty-six".