1625553525 has 12 divisors (see below), whose sum is σ = 2687581952. Its totient is φ = 866961840.

The previous prime is 1625553509. The next prime is 1625553529. The reversal of 1625553525 is 5253555261.

It is not a de Polignac number, because 1625553525 - 2⁴ = 1625553509 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625553529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10836949 + ... + 10837098.

Almost surely, 2^1625553525 is an apocalyptic number.

1625553525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1625553525 is a deficient number, since it is larger than the sum of its proper divisors (1062028427).

1625553525 is a wasteful number, since it uses less digits than its factorization.

1625553525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21674060 (or 21674055 counting only the distinct ones).

The product of its digits is 225000, while the sum is 39.

The square root of 1625553525 is about 40318.1537895772. The cubic root of 1625553525 is about 1175.8008181969.

The spelling of 1625553525 in words is "one billion, six hundred twenty-five million, five hundred fifty-three thousand, five hundred twenty-five".