401625565 has 16 divisors (see below), whose sum is σ = 539976960. Its totient is φ = 284195520.

The previous prime is 401625551. The next prime is 401625569. The reversal of 401625565 is 565526104.

It is not a de Polignac number, because 401625565 - 2⁵ = 401625533 is a prime.

It is a super-2 number, since 2×401625565² = 322606188923138450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401625565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401625569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96645 + ... + 100714.

It is an arithmetic number, because the mean of its divisors is an integer number (33748560).

Almost surely, 2^401625565 is an apocalyptic number.

It is an amenable number.

401625565 is a deficient number, since it is larger than the sum of its proper divisors (138351395).

401625565 is a wasteful number, since it uses less digits than its factorization.

401625565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197412.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 401625565 is about 20040.5979202218. The cubic root of 401625565 is about 737.8030561452.

The spelling of 401625565 in words is "four hundred one million, six hundred twenty-five thousand, five hundred sixty-five".