857132640707 has 4 divisors (see below), whose sum is σ = 979580160816. Its totient is φ = 734685120600.

The previous prime is 857132640703. The next prime is 857132640733. The reversal of 857132640707 is 707046231758.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 857132640707 - 2² = 857132640703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857132640703) 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, 61223760044 + ... + 61223760057.

It is an arithmetic number, because the mean of its divisors is an integer number (244895040204).

Almost surely, 2^857132640707 is an apocalyptic number.

857132640707 is a deficient number, since it is larger than the sum of its proper divisors (122447520109).

857132640707 is a wasteful number, since it uses less digits than its factorization.

857132640707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122447520108.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 857132640707 in words is "eight hundred fifty-seven billion, one hundred thirty-two million, six hundred forty thousand, seven hundred seven".