425664506 has 8 divisors (see below), whose sum is σ = 642064320. Its totient is φ = 211643068.

The previous prime is 425664469. The next prime is 425664521. The reversal of 425664506 is 605466524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 425664506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594146 + ... + 594861.

It is an arithmetic number, because the mean of its divisors is an integer number (80258040).

Almost surely, 2^425664506 is an apocalyptic number.

425664506 is a deficient number, since it is larger than the sum of its proper divisors (216399814).

425664506 is a wasteful number, since it uses less digits than its factorization.

425664506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189188.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 425664506 is about 20631.6384710473. The cubic root of 425664506 is about 752.2389427149.

The spelling of 425664506 in words is "four hundred twenty-five million, six hundred sixty-four thousand, five hundred six".