61974964507 has 2 divisors, whose sum is σ = 61974964508. Its totient is φ = 61974964506.

The previous prime is 61974964487. The next prime is 61974964543. The reversal of 61974964507 is 70546947916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61974964507 - 2⁷ = 61974964379 is a prime.

It is not a weakly prime, because it can be changed into another prime (61974962507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30987482253 + 30987482254.

It is an arithmetic number, because the mean of its divisors is an integer number (30987482254).

Almost surely, 2^61974964507 is an apocalyptic number.

61974964507 is a deficient number, since it is larger than the sum of its proper divisors (1).

61974964507 is an equidigital number, since it uses as much as digits as its factorization.

61974964507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 61974964507 in words is "sixty-one billion, nine hundred seventy-four million, nine hundred sixty-four thousand, five hundred seven".