1625813487 has 12 divisors (see below), whose sum is σ = 2366890240. Its totient is φ = 1075340448.

The previous prime is 1625813473. The next prime is 1625813509. The reversal of 1625813487 is 7843185261.

1625813487 is a `hidden beast` number, since 1 + 62 + 581 + 3 + 4 + 8 + 7 = 666.

It is not a de Polignac number, because 1625813487 - 2⁴ = 1625813471 is a prime.

It is a super-2 number, since 2×1625813487² = 5286538989022198338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625813407) 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, 710062 + ... + 712347.

Almost surely, 2^1625813487 is an apocalyptic number.

1625813487 is a deficient number, since it is larger than the sum of its proper divisors (741076753).

1625813487 is a wasteful number, since it uses less digits than its factorization.

1625813487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422542 (or 1422539 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 1625813487 is about 40321.3775434322. The cubic root of 1625813487 is about 1175.8634937174.

The spelling of 1625813487 in words is "one billion, six hundred twenty-five million, eight hundred thirteen thousand, four hundred eighty-seven".