61722757161427 has 32 divisors (see below), whose sum is σ = 62998831226880. Its totient is φ = 60464185447680.

The previous prime is 61722757161389. The next prime is 61722757161469. The reversal of 61722757161427 is 72416175722716.

It is a cyclic number.

It is not a de Polignac number, because 61722757161427 - 2¹¹ = 61722757159379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61722757161727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7331360224 + ... + 7331368642.

It is an arithmetic number, because the mean of its divisors is an integer number (1968713475840).

Almost surely, 2^{61722757161427} is an apocalyptic number.

61722757161427 is a deficient number, since it is larger than the sum of its proper divisors (1276074065453).

61722757161427 is a wasteful number, since it uses less digits than its factorization.

61722757161427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10891.

The product of its digits is 13829760, while the sum is 58.

The spelling of 61722757161427 in words is "sixty-one trillion, seven hundred twenty-two billion, seven hundred fifty-seven million, one hundred sixty-one thousand, four hundred twenty-seven".