316618521242 has 4 divisors (see below), whose sum is σ = 474927781866. Its totient is φ = 158309260620.

The previous prime is 316618521229. The next prime is 316618521277. The reversal of 316618521242 is 242125816613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242125816613 = 101 ⋅2397285313.

It can be written as a sum of positive squares in only one way, i.e., 275153751601 + 41464769641 = 524551^2 + 203629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 316618521242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79154630309 + ... + 79154630312.

Almost surely, 2^316618521242 is an apocalyptic number.

316618521242 is a deficient number, since it is larger than the sum of its proper divisors (158309260624).

316618521242 is a wasteful number, since it uses less digits than its factorization.

316618521242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158309260623.

The product of its digits is 138240, while the sum is 41.

The spelling of 316618521242 in words is "three hundred sixteen billion, six hundred eighteen million, five hundred twenty-one thousand, two hundred forty-two".