87736181331913 has 8 divisors (see below), whose sum is σ = 88146769552200. Its totient is φ = 87325831901568.

The previous prime is 87736181331899. The next prime is 87736181332031. The reversal of 87736181331913 is 31913318163778.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18742691294089 + 68993490037824 = 4329283^2 + 8306232^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 87736181331913 - 2¹⁷ = 87736181200841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87736181331613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58960906 + ... + 60430627.

It is an arithmetic number, because the mean of its divisors is an integer number (11018346194025).

Almost surely, 2^{87736181331913} is an apocalyptic number.

It is an amenable number.

87736181331913 is a deficient number, since it is larger than the sum of its proper divisors (410588220287).

87736181331913 is a wasteful number, since it uses less digits than its factorization.

87736181331913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119394971.

The product of its digits is 13716864, while the sum is 61.

The spelling of 87736181331913 in words is "eighty-seven trillion, seven hundred thirty-six billion, one hundred eighty-one million, three hundred thirty-one thousand, nine hundred thirteen".