857611009725 has 24 divisors (see below), whose sum is σ = 1418622199392. Its totient is φ = 457165012800.

The previous prime is 857611009691. The next prime is 857611009727. The reversal of 857611009725 is 527900116758.

It is not a de Polignac number, because 857611009725 - 2⁷ = 857611009597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857611009727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2692242 + ... + 2993891.

It is an arithmetic number, because the mean of its divisors is an integer number (59109258308).

Almost surely, 2^857611009725 is an apocalyptic number.

It is an amenable number.

857611009725 is a deficient number, since it is larger than the sum of its proper divisors (561011189667).

857611009725 is a wasteful number, since it uses less digits than its factorization.

857611009725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688157 (or 5688152 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 51.

The spelling of 857611009725 in words is "eight hundred fifty-seven billion, six hundred eleven million, nine thousand, seven hundred twenty-five".