61057722570 has 96 divisors (see below), whose sum is σ = 164735206272. Its totient is φ = 14370622464.

The previous prime is 61057722541. The next prime is 61057722587. The reversal of 61057722570 is 7522775016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23401426 + ... + 23404034.

It is an arithmetic number, because the mean of its divisors is an integer number (1715991732).

Almost surely, 2^61057722570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61057722570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82367603136).

61057722570 is an abundant number, since it is smaller than the sum of its proper divisors (103677483702).

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

61057722570 is a wasteful number, since it uses less digits than its factorization.

61057722570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5264 (or 2655 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 61057722570 in words is "sixty-one billion, fifty-seven million, seven hundred twenty-two thousand, five hundred seventy".