1625138750 has 20 divisors (see below), whose sum is σ = 3046162416. Its totient is φ = 650055000.

The previous prime is 1625138747. The next prime is 1625138773. The reversal of 1625138750 is 578315261.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 648806 + ... + 651305.

Almost surely, 2^1625138750 is an apocalyptic number.

1625138750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1625138750 is a deficient number, since it is larger than the sum of its proper divisors (1421023666).

1625138750 is an equidigital number, since it uses as much as digits as its factorization.

1625138750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300133 (or 1300118 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 1625138750 is about 40313.0096867004. The cubic root of 1625138750 is about 1175.7008042094.

The spelling of 1625138750 in words is "one billion, six hundred twenty-five million, one hundred thirty-eight thousand, seven hundred fifty".