61000505056 has 36 divisors (see below), whose sum is σ = 125543311992. Its totient is φ = 29174146496.

The previous prime is 61000505047. The next prime is 61000505101. The reversal of 61000505056 is 65050500016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1784836 + ... + 1818691.

It is an arithmetic number, because the mean of its divisors is an integer number (3487314222).

Almost surely, 2^61000505056 is an apocalyptic number.

It is an amenable number.

61000505056 is an abundant number, since it is smaller than the sum of its proper divisors (64542806936).

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

61000505056 is a wasteful number, since it uses less digits than its factorization.

61000505056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603583 (or 3603552 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 61000505056 in words is "sixty-one billion, five hundred five thousand, fifty-six".