55161660101556 has 24 divisors (see below), whose sum is σ = 131139040997664. Its totient is φ = 18040291353760.

The previous prime is 55161660101423. The next prime is 55161660101621. The reversal of 55161660101556 is 65510106616155.

It is a super-2 number, since 2×55161660101556² (a number of 28 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, 43366084350 + ... + 43366085621.

It is an arithmetic number, because the mean of its divisors is an integer number (5464126708236).

Almost surely, 2^{55161660101556} is an apocalyptic number.

It is an amenable number.

55161660101556 is an abundant number, since it is smaller than the sum of its proper divisors (75977380896108).

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

55161660101556 is a wasteful number, since it uses less digits than its factorization.

55161660101556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86732170031 (or 86732170029 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 55161660101556 in words is "fifty-five trillion, one hundred sixty-one billion, six hundred sixty million, one hundred one thousand, five hundred fifty-six".