1625978375 has 16 divisors (see below), whose sum is σ = 2319110976. Its totient is φ = 1114956000.

The previous prime is 1625978359. The next prime is 1625978381. The reversal of 1625978375 is 5738795261.

It is not a de Polignac number, because 1625978375 - 2⁴ = 1625978359 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 928256 + ... + 930005.

It is an arithmetic number, because the mean of its divisors is an integer number (144944436).

Almost surely, 2^1625978375 is an apocalyptic number.

1625978375 is a deficient number, since it is larger than the sum of its proper divisors (693132601).

1625978375 is an equidigital number, since it uses as much as digits as its factorization.

1625978375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858283 (or 1858273 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 53.

The square root of 1625978375 is about 40323.4221637995. The cubic root of 1625978375 is about 1175.9032439157.

The spelling of 1625978375 in words is "one billion, six hundred twenty-five million, nine hundred seventy-eight thousand, three hundred seventy-five".