6516156220220 has 36 divisors (see below), whose sum is σ = 13820754361512. Its totient is φ = 2580655848000.

The previous prime is 6516156220213. The next prime is 6516156220261. The reversal of 6516156220220 is 220226516156.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15765386 + ... + 16173425.

Almost surely, 2^{6516156220220} is an apocalyptic number.

It is an amenable number.

6516156220220 is an abundant number, since it is smaller than the sum of its proper divisors (7304598141292).

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

6516156220220 is a wasteful number, since it uses less digits than its factorization.

6516156220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31939022 (or 31938919 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

It can be divided in two parts, 6516156 and 220220, that added together give a palindrome (6736376).

The spelling of 6516156220220 in words is "six trillion, five hundred sixteen billion, one hundred fifty-six million, two hundred twenty thousand, two hundred twenty".