1625023685 has 4 divisors (see below), whose sum is σ = 1950028428. Its totient is φ = 1300018944.

The previous prime is 1625023681. The next prime is 1625023709. The reversal of 1625023685 is 5863205261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 920333569 + 704690116 = 30337^2 + 26546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1625023685 - 2² = 1625023681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625023681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162502364 + ... + 162502373.

It is an arithmetic number, because the mean of its divisors is an integer number (487507107).

Almost surely, 2^1625023685 is an apocalyptic number.

It is an amenable number.

1625023685 is a deficient number, since it is larger than the sum of its proper divisors (325004743).

1625023685 is an equidigital number, since it uses as much as digits as its factorization.

1625023685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325004742.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 1625023685 is about 40311.5825166912. The cubic root of 1625023685 is about 1175.6730557672.

The spelling of 1625023685 in words is "one billion, six hundred twenty-five million, twenty-three thousand, six hundred eighty-five".