6405156325 has 36 divisors (see below), whose sum is σ = 8197186284. Its totient is φ = 4964608000.

The previous prime is 6405156323. The next prime is 6405156337. The reversal of 6405156325 is 5236515046.

It can be written as a sum of positive squares in 18 ways, for example, as 6275333089 + 129823236 = 79217^2 + 11394^2 .

It is not a de Polignac number, because 6405156325 - 2¹ = 6405156323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405156323) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7269885 + ... + 7270765.

It is an arithmetic number, because the mean of its divisors is an integer number (227699619).

Almost surely, 2^6405156325 is an apocalyptic number.

It is an amenable number.

6405156325 is a deficient number, since it is larger than the sum of its proper divisors (1792029959).

6405156325 is a wasteful number, since it uses less digits than its factorization.

6405156325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 1100 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 6405156325 is about 80032.2205427289. The cubic root of 6405156325 is about 1857.1340150255.

The spelling of 6405156325 in words is "six billion, four hundred five million, one hundred fifty-six thousand, three hundred twenty-five".