55661560156 has 24 divisors (see below), whose sum is σ = 99757738080. Its totient is φ = 27167112000.

The previous prime is 55661560153. The next prime is 55661560183. The reversal of 55661560156 is 65106516655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55661560153) 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, 941571 + ... + 998938.

It is an arithmetic number, because the mean of its divisors is an integer number (4156572420).

Almost surely, 2^55661560156 is an apocalyptic number.

It is an amenable number.

55661560156 is a deficient number, since it is larger than the sum of its proper divisors (44096177924).

55661560156 is a wasteful number, since it uses less digits than its factorization.

55661560156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940685 (or 1940683 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 55661560156 in words is "fifty-five billion, six hundred sixty-one million, five hundred sixty thousand, one hundred fifty-six".