643151425 has 48 divisors (see below), whose sum is σ = 974064640. Its totient is φ = 411428160.

The previous prime is 643151417. The next prime is 643151437. The reversal of 643151425 is 524151346.

It is a happy number.

It is not a de Polignac number, because 643151425 - 2³ = 643151417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221332 + ... + 224218.

Almost surely, 2^643151425 is an apocalyptic number.

It is an amenable number.

643151425 is a deficient number, since it is larger than the sum of its proper divisors (330913215).

643151425 is a wasteful number, since it uses less digits than its factorization.

643151425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990 (or 2985 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 643151425 is about 25360.4302999772. The cubic root of 643151425 is about 863.1860480132.

The spelling of 643151425 in words is "six hundred forty-three million, one hundred fifty-one thousand, four hundred twenty-five".