61388752558961 has 2 divisors, whose sum is σ = 61388752558962. Its totient is φ = 61388752558960.

The previous prime is 61388752558871. The next prime is 61388752559009. The reversal of 61388752558961 is 16985525788316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50326183869025 + 11062568689936 = 7094095^2 + 3326044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61388752558961 is a prime.

It is not a weakly prime, because it can be changed into another prime (61388752558361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30694376279480 + 30694376279481.

It is an arithmetic number, because the mean of its divisors is an integer number (30694376279481).

Almost surely, 2^{61388752558961} is an apocalyptic number.

It is an amenable number.

61388752558961 is a deficient number, since it is larger than the sum of its proper divisors (1).

61388752558961 is an equidigital number, since it uses as much as digits as its factorization.

61388752558961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912000, while the sum is 74.

The spelling of 61388752558961 in words is "sixty-one trillion, three hundred eighty-eight billion, seven hundred fifty-two million, five hundred fifty-eight thousand, nine hundred sixty-one".