61031055516 has 24 divisors (see below), whose sum is σ = 142411342080. Its totient is φ = 20342892912.

The previous prime is 61031055511. The next prime is 61031055517. The reversal of 61031055516 is 61555013016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61031055511) 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, 279955 + ... + 447701.

It is an arithmetic number, because the mean of its divisors is an integer number (5933805920).

Almost surely, 2^61031055516 is an apocalyptic number.

It is an amenable number.

61031055516 is an abundant number, since it is smaller than the sum of its proper divisors (81380286564).

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

61031055516 is a wasteful number, since it uses less digits than its factorization.

61031055516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198073 (or 198071 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The spelling of 61031055516 in words is "sixty-one billion, thirty-one million, fifty-five thousand, five hundred sixteen".