317155807642 has 4 divisors (see below), whose sum is σ = 475733711466. Its totient is φ = 158577903820.

The previous prime is 317155807607. The next prime is 317155807667. The reversal of 317155807642 is 246708551713.

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

It can be written as a sum of positive squares in only one way, i.e., 190540107081 + 126615700561 = 436509^2 + 355831^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79288951909 + ... + 79288951912.

Almost surely, 2^317155807642 is an apocalyptic number.

317155807642 is a deficient number, since it is larger than the sum of its proper divisors (158577903824).

317155807642 is a wasteful number, since it uses less digits than its factorization.

317155807642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158577903823.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 317155807642 in words is "three hundred seventeen billion, one hundred fifty-five million, eight hundred seven thousand, six hundred forty-two".