1625641357 has 8 divisors (see below), whose sum is σ = 1700012160. Its totient is φ = 1551578160.

The previous prime is 1625641331. The next prime is 1625641379. The reversal of 1625641357 is 7531465261.

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

It is not a de Polignac number, because 1625641357 - 2⁷ = 1625641229 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 (1625641057) 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, 66057 + ... + 87262.

It is an arithmetic number, because the mean of its divisors is an integer number (212501520).

Almost surely, 2^1625641357 is an apocalyptic number.

It is an amenable number.

1625641357 is a deficient number, since it is larger than the sum of its proper divisors (74370803).

1625641357 is a wasteful number, since it uses less digits than its factorization.

1625641357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153803.

The product of its digits is 151200, while the sum is 40.

The square root of 1625641357 is about 40319.2430112471. The cubic root of 1625641357 is about 1175.8219947943.

The spelling of 1625641357 in words is "one billion, six hundred twenty-five million, six hundred forty-one thousand, three hundred fifty-seven".