61716517307 has 48 divisors (see below), whose sum is σ = 71529722880. Its totient is φ = 53035430400.

The previous prime is 61716517259. The next prime is 61716517321. The reversal of 61716517307 is 70371561716.

It is not a de Polignac number, because 61716517307 - 2¹² = 61716513211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61716517397) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52257257 + ... + 52258437.

It is an arithmetic number, because the mean of its divisors is an integer number (1490202560).

Almost surely, 2^61716517307 is an apocalyptic number.

61716517307 is a deficient number, since it is larger than the sum of its proper divisors (9813205573).

61716517307 is a wasteful number, since it uses less digits than its factorization.

61716517307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 185220, while the sum is 44.

The spelling of 61716517307 in words is "sixty-one billion, seven hundred sixteen million, five hundred seventeen thousand, three hundred seven".