59697637561 has 9 divisors (see below), whose sum is σ = 60544705071. Its totient is φ = 58862269872.

The previous prime is 59697637387. The next prime is 59697637589. The reversal of 59697637561 is 16573679695.

The square root of 59697637561 is 244331.

It is a perfect power (a square), and thus also a powerful number.

59697637561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33887287225 + 25810350336 = 184085^2 + 160656^2 .

It is not a de Polignac number, because 59697637561 - 2¹¹ = 59697635513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 59697637493 and 59697637502.

It is not an unprimeable number, because it can be changed into a prime (59697637591) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17834490 + ... + 17837836.

Almost surely, 2^59697637561 is an apocalyptic number.

59697637561 is the 244331-st square number.

59697637561 is the 122166-th centered octagonal number.

It is an amenable number.

59697637561 is a deficient number, since it is larger than the sum of its proper divisors (847067510).

59697637561 is an frugal number, since it uses more digits than its factorization.

59697637561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840 (or 3420 counting only the distinct ones).

The product of its digits is 64297800, while the sum is 64.

Multiplying 59697637561 by its sum of digits (64), we get a square (3820648803904 = 1954648²).

The spelling of 59697637561 in words is "fifty-nine billion, six hundred ninety-seven million, six hundred thirty-seven thousand, five hundred sixty-one".