61688819577 has 16 divisors (see below), whose sum is σ = 102547648512. Its totient is φ = 32046139920.

The previous prime is 61688819561. The next prime is 61688819641. The reversal of 61688819577 is 77591888616.

It is not a de Polignac number, because 61688819577 - 2⁴ = 61688819561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61688819537) 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, 133525353 + ... + 133525814.

It is an arithmetic number, because the mean of its divisors is an integer number (6409228032).

Almost surely, 2^61688819577 is an apocalyptic number.

It is an amenable number.

61688819577 is a deficient number, since it is larger than the sum of its proper divisors (40858828935).

61688819577 is a wasteful number, since it uses less digits than its factorization.

61688819577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267051188.

The product of its digits is 40642560, while the sum is 66.

The spelling of 61688819577 in words is "sixty-one billion, six hundred eighty-eight million, eight hundred nineteen thousand, five hundred seventy-seven".