1625624441 has 24 divisors (see below), whose sum is σ = 1939445064. Its totient is φ = 1358138880.

The previous prime is 1625624431. The next prime is 1625624443. The reversal of 1625624441 is 1444265261.

It can be written as a sum of positive squares in 4 ways, for example, as 17935225 + 1607689216 = 4235^2 + 40096^2 .

It is not a de Polignac number, because 1625624441 - 2²⁶ = 1558515577 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625624443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335351 + ... + 340163.

It is an arithmetic number, because the mean of its divisors is an integer number (80810211).

Almost surely, 2^1625624441 is an apocalyptic number.

It is an amenable number.

1625624441 is a deficient number, since it is larger than the sum of its proper divisors (313820623).

1625624441 is a wasteful number, since it uses less digits than its factorization.

1625624441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001 (or 4994 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

The square root of 1625624441 is about 40319.0332349376. The cubic root of 1625624441 is about 1175.8179163478.

The spelling of 1625624441 in words is "one billion, six hundred twenty-five million, six hundred twenty-four thousand, four hundred forty-one".