61591707299783 has 2 divisors, whose sum is σ = 61591707299784. Its totient is φ = 61591707299782.

The previous prime is 61591707299779. The next prime is 61591707299827. The reversal of 61591707299783 is 38799270719516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61591707299783 - 2² = 61591707299779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61591707299783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61591707299713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30795853649891 + 30795853649892.

It is an arithmetic number, because the mean of its divisors is an integer number (30795853649892).

Almost surely, 2^{61591707299783} is an apocalyptic number.

61591707299783 is a deficient number, since it is larger than the sum of its proper divisors (1).

61591707299783 is an equidigital number, since it uses as much as digits as its factorization.

61591707299783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360067680, while the sum is 74.

The spelling of 61591707299783 in words is "sixty-one trillion, five hundred ninety-one billion, seven hundred seven million, two hundred ninety-nine thousand, seven hundred eighty-three".