6381531025 has 6 divisors (see below), whose sum is σ = 7913098502. Its totient is φ = 5105224800.

The previous prime is 6381530999. The next prime is 6381531031. The reversal of 6381531025 is 5201351836.

It can be written as a sum of positive squares in 3 ways, for example, as 1426497361 + 4955033664 = 37769^2 + 70392^2 .

It is not a de Polignac number, because 6381531025 - 2⁵ = 6381530993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127630596 + ... + 127630645.

Almost surely, 2^6381531025 is an apocalyptic number.

It is an amenable number.

6381531025 is a deficient number, since it is larger than the sum of its proper divisors (1531567477).

6381531025 is a wasteful number, since it uses less digits than its factorization.

6381531025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255261251 (or 255261246 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 6381531025 is about 79884.4855087645. The cubic root of 6381531025 is about 1854.8478671525.

The spelling of 6381531025 in words is "six billion, three hundred eighty-one million, five hundred thirty-one thousand, twenty-five".