61298120872 has 64 divisors (see below), whose sum is σ = 128867760000. Its totient is φ = 27164123136.

The previous prime is 61298120857. The next prime is 61298120953. The reversal of 61298120872 is 27802189216.

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, 360504 + ... + 502552.

It is an arithmetic number, because the mean of its divisors is an integer number (2013558750).

Almost surely, 2^61298120872 is an apocalyptic number.

It is an amenable number.

61298120872 is an abundant number, since it is smaller than the sum of its proper divisors (67569639128).

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

61298120872 is a wasteful number, since it uses less digits than its factorization.

61298120872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142258 (or 142254 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 61298120872 in words is "sixty-one billion, two hundred ninety-eight million, one hundred twenty thousand, eight hundred seventy-two".