61560403939 has 2 divisors, whose sum is σ = 61560403940. Its totient is φ = 61560403938.

The previous prime is 61560403843. The next prime is 61560403987. The reversal of 61560403939 is 93930406516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61560403939 - 2¹⁷ = 61560272867 is a prime.

It is not a weakly prime, because it can be changed into another prime (61560400939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30780201969 + 30780201970.

It is an arithmetic number, because the mean of its divisors is an integer number (30780201970).

Almost surely, 2^61560403939 is an apocalyptic number.

61560403939 is a deficient number, since it is larger than the sum of its proper divisors (1).

61560403939 is an equidigital number, since it uses as much as digits as its factorization.

61560403939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 46.

The spelling of 61560403939 in words is "sixty-one billion, five hundred sixty million, four hundred three thousand, nine hundred thirty-nine".