61715516605501 has 16 divisors (see below), whose sum is σ = 67950931862016. Its totient is φ = 56048399352000.

The previous prime is 61715516605441. The next prime is 61715516605529. The reversal of 61715516605501 is 10550661551716.

It is not a de Polignac number, because 61715516605501 - 2¹³ = 61715516597309 is a prime.

It is a super-2 number, since 2×61715516605501² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61715516605591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22075420 + ... + 24713461.

It is an arithmetic number, because the mean of its divisors is an integer number (4246933241376).

Almost surely, 2^{61715516605501} is an apocalyptic number.

It is an amenable number.

61715516605501 is a deficient number, since it is larger than the sum of its proper divisors (6235415256515).

61715516605501 is an equidigital number, since it uses as much as digits as its factorization.

61715516605501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46789905 (or 46789883 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 49.

The spelling of 61715516605501 in words is "sixty-one trillion, seven hundred fifteen billion, five hundred sixteen million, six hundred five thousand, five hundred one".