61251505722 has 64 divisors (see below), whose sum is σ = 151647897600. Its totient is φ = 18166137840.

The previous prime is 61251505681. The next prime is 61251505751. The reversal of 61251505722 is 22750515216.

61251505722 is a `hidden beast` number, since 6 + 125 + 1 + 505 + 7 + 22 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1069072 + ... + 1124907.

It is an arithmetic number, because the mean of its divisors is an integer number (2369498400).

Almost surely, 2^61251505722 is an apocalyptic number.

61251505722 is an abundant number, since it is smaller than the sum of its proper divisors (90396391878).

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

61251505722 is a wasteful number, since it uses less digits than its factorization.

61251505722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194048 (or 2194042 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 61251505722 in words is "sixty-one billion, two hundred fifty-one million, five hundred five thousand, seven hundred twenty-two".