61521422412516 has 48 divisors (see below), whose sum is σ = 156658006713600. Its totient is φ = 18635947849120.

The previous prime is 61521422412409. The next prime is 61521422412539.

61521422412516 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85985226 + ... + 86697761.

It is an arithmetic number, because the mean of its divisors is an integer number (3263708473200).

Almost surely, 2^{61521422412516} is an apocalyptic number.

61521422412516 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

61521422412516 is an abundant number, since it is smaller than the sum of its proper divisors (95136584301084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61521422412516 is a wasteful number, since it uses less digits than its factorization.

61521422412516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172685704 (or 172685702 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

It can be divided in two parts, 6152142 and 2412516, that added together give a palindrome (8564658).

The spelling of 61521422412516 in words is "sixty-one trillion, five hundred twenty-one billion, four hundred twenty-two million, four hundred twelve thousand, five hundred sixteen".