2318131870657 has 4 divisors (see below), whose sum is σ = 2344178296260. Its totient is φ = 2292085445056.

The previous prime is 2318131870633. The next prime is 2318131870661. The reversal of 2318131870657 is 7560781318132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 168063921936 + 2150067948721 = 409956^2 + 1466311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2318131870657 - 2¹¹ = 2318131868609 is a prime.

It is a super-2 number, since 2×2318131870657² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2318131870357) 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, 13023212668 + ... + 13023212845.

It is an arithmetic number, because the mean of its divisors is an integer number (586044574065).

Almost surely, 2^{2318131870657} is an apocalyptic number.

It is an amenable number.

2318131870657 is a deficient number, since it is larger than the sum of its proper divisors (26046425603).

2318131870657 is an equidigital number, since it uses as much as digits as its factorization.

2318131870657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26046425602.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 2318131870657 in words is "two trillion, three hundred eighteen billion, one hundred thirty-one million, eight hundred seventy thousand, six hundred fifty-seven".