131817502690 has 8 divisors (see below), whose sum is σ = 237271504860. Its totient is φ = 52727001072.

The previous prime is 131817502633. The next prime is 131817502709. The reversal of 131817502690 is 96205718131.

It can be written as a sum of positive squares in 2 ways, for example, as 122660352441 + 9157150249 = 350229^2 + 95693^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×131817502690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6590875125 + ... + 6590875144.

Almost surely, 2^131817502690 is an apocalyptic number.

131817502690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131817502690 is a deficient number, since it is larger than the sum of its proper divisors (105454002170).

131817502690 is a wasteful number, since it uses less digits than its factorization.

131817502690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13181750276.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 131817502690 in words is "one hundred thirty-one billion, eight hundred seventeen million, five hundred two thousand, six hundred ninety".