61756451372 has 48 divisors (see below), whose sum is σ = 135645753600. Its totient is φ = 23899454400.

The previous prime is 61756451357. The next prime is 61756451381. The reversal of 61756451372 is 27315465716.

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 15 ways as a sum of consecutive naturals, for example, 626954 + ... + 718737.

It is an arithmetic number, because the mean of its divisors is an integer number (2825953200).

Almost surely, 2^61756451372 is an apocalyptic number.

It is an amenable number.

61756451372 is an abundant number, since it is smaller than the sum of its proper divisors (73889302228).

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

61756451372 is a wasteful number, since it uses less digits than its factorization.

61756451372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345862 (or 1345860 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 47.

The spelling of 61756451372 in words is "sixty-one billion, seven hundred fifty-six million, four hundred fifty-one thousand, three hundred seventy-two".