61506601570751 has 2 divisors, whose sum is σ = 61506601570752. Its totient is φ = 61506601570750.

The previous prime is 61506601570717. The next prime is 61506601570787. The reversal of 61506601570751 is 15707510660516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61506601570751 - 2²⁶ = 61506534461887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61506601570751.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61506601570151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30753300785375 + 30753300785376.

It is an arithmetic number, because the mean of its divisors is an integer number (30753300785376).

Almost surely, 2^{61506601570751} is an apocalyptic number.

61506601570751 is a deficient number, since it is larger than the sum of its proper divisors (1).

61506601570751 is an equidigital number, since it uses as much as digits as its factorization.

61506601570751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323000, while the sum is 50.

The spelling of 61506601570751 in words is "sixty-one trillion, five hundred six billion, six hundred one million, five hundred seventy thousand, seven hundred fifty-one".