61500105556 has 24 divisors (see below), whose sum is σ = 114100975296. Its totient is φ = 28904426880.

The previous prime is 61500105551. The next prime is 61500105599. The reversal of 61500105556 is 65550100516.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61500105551) 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, 521080 + ... + 628111.

It is an arithmetic number, because the mean of its divisors is an integer number (4754207304).

Almost surely, 2^61500105556 is an apocalyptic number.

It is an amenable number.

61500105556 is a deficient number, since it is larger than the sum of its proper divisors (52600869740).

61500105556 is a wasteful number, since it uses less digits than its factorization.

61500105556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149999 (or 1149997 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 61500105556 in words is "sixty-one billion, five hundred million, one hundred five thousand, five hundred fifty-six".