1625138733 has 8 divisors (see below), whose sum is σ = 2167165728. Its totient is φ = 1083268784.

The previous prime is 1625138719. The next prime is 1625138737. The reversal of 1625138733 is 3378315261.

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

It is a cyclic number.

It is not a de Polignac number, because 1625138733 - 2⁵ = 1625138701 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1625138691 and 1625138700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625138737) 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, 12510 + ... + 58367.

It is an arithmetic number, because the mean of its divisors is an integer number (270895716).

Almost surely, 2^1625138733 is an apocalyptic number.

It is an amenable number.

1625138733 is a deficient number, since it is larger than the sum of its proper divisors (542026995).

1625138733 is an equidigital number, since it uses as much as digits as its factorization.

1625138733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78523.

The product of its digits is 90720, while the sum is 39.

The square root of 1625138733 is about 40313.0094758503. The cubic root of 1625138733 is about 1175.7008001099.

The spelling of 1625138733 in words is "one billion, six hundred twenty-five million, one hundred thirty-eight thousand, seven hundred thirty-three".