1625865897 has 8 divisors (see below), whose sum is σ = 2237751040. Its totient is φ = 1048945680.

The previous prime is 1625865887. The next prime is 1625865911. The reversal of 1625865897 is 7985685261.

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

It is not a de Polignac number, because 1625865897 - 2⁶ = 1625865833 is a prime.

It is a super-2 number, since 2×1625865897² = 5286879830055229218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625865817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8741122 + ... + 8741307.

It is an arithmetic number, because the mean of its divisors is an integer number (279718880).

Almost surely, 2^1625865897 is an apocalyptic number.

It is an amenable number.

1625865897 is a deficient number, since it is larger than the sum of its proper divisors (611885143).

1625865897 is a wasteful number, since it uses less digits than its factorization.

1625865897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17482463.

The product of its digits is 7257600, while the sum is 57.

The square root of 1625865897 is about 40322.0274415858. The cubic root of 1625865897 is about 1175.8761286935.

The spelling of 1625865897 in words is "one billion, six hundred twenty-five million, eight hundred sixty-five thousand, eight hundred ninety-seven".