6520061944 has 16 divisors (see below), whose sum is σ = 13336490520. Its totient is φ = 2963664480.

The previous prime is 6520061897. The next prime is 6520062001. The reversal of 6520061944 is 4491600256.

It is a super-2 number, since 2×6520061944² = 85022415507194118272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37045719 + ... + 37045894.

Almost surely, 2^6520061944 is an apocalyptic number.

It is an amenable number.

6520061944 is an abundant number, since it is smaller than the sum of its proper divisors (6816428576).

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

6520061944 is a wasteful number, since it uses less digits than its factorization.

6520061944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74091630 (or 74091626 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 6520061944 is about 80746.9005225588. The cubic root of 6520061944 is about 1868.1736430830.

The spelling of 6520061944 in words is "six billion, five hundred twenty million, sixty-one thousand, nine hundred forty-four".