61122079872 has 128 divisors (see below), whose sum is σ = 206165827200. Its totient is φ = 17463444480.

The previous prime is 61122079861. The next prime is 61122079901. The reversal of 61122079872 is 27897022116.

It is a happy number.

61122079872 is a `hidden beast` number, since 611 + 2 + 20 + 7 + 9 + 8 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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, 1239079 + ... + 1287462.

It is an arithmetic number, because the mean of its divisors is an integer number (1610670525).

Almost surely, 2^61122079872 is an apocalyptic number.

It is an amenable number.

61122079872 is an abundant number, since it is smaller than the sum of its proper divisors (145043747328).

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

61122079872 is a wasteful number, since it uses less digits than its factorization.

61122079872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526571 (or 2526553 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 61122079872 in words is "sixty-one billion, one hundred twenty-two million, seventy-nine thousand, eight hundred seventy-two".