101556661560 has 64 divisors (see below), whose sum is σ = 304743751200. Its totient is φ = 27075219456.

The previous prime is 101556661559. The next prime is 101556661649. The reversal of 101556661560 is 65166655101.

101556661560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405696 + ... + 606384.

Almost surely, 2^101556661560 is an apocalyptic number.

101556661560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101556661560 is an abundant number, since it is smaller than the sum of its proper divisors (203187089640).

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

101556661560 is a wasteful number, since it uses less digits than its factorization.

101556661560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204920 (or 204916 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

It can be divided in two parts, 101 and 556661560, that added together give a triangular number (556661661 = T₃₃₃₆₆).

The spelling of 101556661560 in words is "one hundred one billion, five hundred fifty-six million, six hundred sixty-one thousand, five hundred sixty".