6400336525 has 24 divisors (see below), whose sum is σ = 8669204064. Its totient is φ = 4648718400.

The previous prime is 6400336519. The next prime is 6400336541. The reversal of 6400336525 is 5256330046.

It is not a de Polignac number, because 6400336525 - 2²¹ = 6398239373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201639 + ... + 231211.

It is an arithmetic number, because the mean of its divisors is an integer number (361216836).

Almost surely, 2^6400336525 is an apocalyptic number.

It is an amenable number.

6400336525 is a deficient number, since it is larger than the sum of its proper divisors (2268867539).

6400336525 is a wasteful number, since it uses less digits than its factorization.

6400336525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30381 (or 30376 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 6400336525 is about 80002.1032536020. The cubic root of 6400336525 is about 1856.6680747640.

The spelling of 6400336525 in words is "six billion, four hundred million, three hundred thirty-six thousand, five hundred twenty-five".