59961561 has 16 divisors (see below), whose sum is σ = 87472128. Its totient is φ = 36234000.

The previous prime is 59961547. The next prime is 59961563. The reversal of 59961561 is 16516995.

It is not a de Polignac number, because 59961561 - 2¹⁴ = 59945177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (59961563) 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, 9636 + ... + 14586.

It is an arithmetic number, because the mean of its divisors is an integer number (5467008).

Almost surely, 2^59961561 is an apocalyptic number.

It is an amenable number.

59961561 is a deficient number, since it is larger than the sum of its proper divisors (27510567).

59961561 is a wasteful number, since it uses less digits than its factorization.

59961561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332.

The product of its digits is 72900, while the sum is 42.

The square root of 59961561 is about 7743.4850681073. The cubic root of 59961561 is about 391.4031442588.

It can be divided in two parts, 5996 and 1561, that added together give a palindrome (7557).

The spelling of 59961561 in words is "fifty-nine million, nine hundred sixty-one thousand, five hundred sixty-one".