61575113772 has 36 divisors (see below), whose sum is σ = 164803982616. Its totient is φ = 19317682560.

The previous prime is 61575113767. The next prime is 61575113791. The reversal of 61575113772 is 27731157516.

61575113772 is a `hidden beast` number, since 6 + 1 + 575 + 1 + 1 + 3 + 7 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50305854 + ... + 50307077.

It is an arithmetic number, because the mean of its divisors is an integer number (4577888406).

Almost surely, 2^61575113772 is an apocalyptic number.

It is an amenable number.

61575113772 is an abundant number, since it is smaller than the sum of its proper divisors (103228868844).

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

61575113772 is a wasteful number, since it uses less digits than its factorization.

61575113772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100612958 (or 100612953 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The spelling of 61575113772 in words is "sixty-one billion, five hundred seventy-five million, one hundred thirteen thousand, seven hundred seventy-two".