6525641920 has 56 divisors (see below), whose sum is σ = 17759074464. Its totient is φ = 2237362176.

The previous prime is 6525641911. The next prime is 6525641921. The reversal of 6525641920 is 291465256.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×6525641920² = 85168004936122572800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (6525641921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454377 + ... + 1458856.

Almost surely, 2^6525641920 is an apocalyptic number.

It is an amenable number.

6525641920 is an abundant number, since it is smaller than the sum of its proper divisors (11233432544).

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

6525641920 is a wasteful number, since it uses less digits than its factorization.

6525641920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913257 (or 2913247 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 6525641920 is about 80781.4453943478. The cubic root of 6525641920 is about 1868.7064290091.

The spelling of 6525641920 in words is "six billion, five hundred twenty-five million, six hundred forty-one thousand, nine hundred twenty".