61157022705 has 16 divisors (see below), whose sum is σ = 108723596160. Its totient is φ = 32617078704.

The previous prime is 61157022697. The next prime is 61157022709. The reversal of 61157022705 is 50722075116.

61157022705 is a `hidden beast` number, since 6 + 11 + 570 + 2 + 2 + 70 + 5 = 666.

It is not a de Polignac number, because 61157022705 - 2³ = 61157022697 is a prime.

It is a super-2 number, since 2×61157022705² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61157022705.

It is not an unprimeable number, because it can be changed into a prime (61157022709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226507357 + ... + 226507626.

It is an arithmetic number, because the mean of its divisors is an integer number (6795224760).

Almost surely, 2^61157022705 is an apocalyptic number.

It is an amenable number.

61157022705 is a deficient number, since it is larger than the sum of its proper divisors (47566573455).

61157022705 is a wasteful number, since it uses less digits than its factorization.

61157022705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453014997 (or 453014991 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The spelling of 61157022705 in words is "sixty-one billion, one hundred fifty-seven million, twenty-two thousand, seven hundred five".