61809495597 has 24 divisors (see below), whose sum is σ = 91208208000. Its totient is φ = 40317108480.

The previous prime is 61809495589. The next prime is 61809495659. The reversal of 61809495597 is 79559490816.

61809495597 is a `hidden beast` number, since 61 + 80 + 9 + 495 + 5 + 9 + 7 = 666.

It is not a de Polignac number, because 61809495597 - 2³ = 61809495589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61809495557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1459197 + ... + 1500957.

It is an arithmetic number, because the mean of its divisors is an integer number (3800342000).

Almost surely, 2^61809495597 is an apocalyptic number.

It is an amenable number.

61809495597 is a deficient number, since it is larger than the sum of its proper divisors (29398712403).

61809495597 is a wasteful number, since it uses less digits than its factorization.

61809495597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45313 (or 45310 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 63.

The spelling of 61809495597 in words is "sixty-one billion, eight hundred nine million, four hundred ninety-five thousand, five hundred ninety-seven".