61607564977 has 16 divisors (see below), whose sum is σ = 71322636672. Its totient is φ = 52122165120.

The previous prime is 61607564911. The next prime is 61607564981. The reversal of 61607564977 is 77946570616.

It is a cyclic number.

It is not a de Polignac number, because 61607564977 - 2²³ = 61599176369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61607564077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589027 + ... + 685687.

It is an arithmetic number, because the mean of its divisors is an integer number (4457664792).

Almost surely, 2^61607564977 is an apocalyptic number.

It is an amenable number.

61607564977 is a deficient number, since it is larger than the sum of its proper divisors (9715071695).

61607564977 is a wasteful number, since it uses less digits than its factorization.

61607564977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97848.

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 61607564977 in words is "sixty-one billion, six hundred seven million, five hundred sixty-four thousand, nine hundred seventy-seven".