3688231292391 has 4 divisors (see below), whose sum is σ = 4917641723192. Its totient is φ = 2458820861592.

The previous prime is 3688231292357. The next prime is 3688231292399. The reversal of 3688231292391 is 1932921328863.

It is a happy number.

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

It is not a de Polignac number, because 3688231292391 - 2⁶ = 3688231292327 is a prime.

It is a super-2 number, since 2×3688231292391² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3688231292399) 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, 614705215396 + ... + 614705215401.

It is an arithmetic number, because the mean of its divisors is an integer number (1229410430798).

Almost surely, 2^{3688231292391} is an apocalyptic number.

3688231292391 is a deficient number, since it is larger than the sum of its proper divisors (1229410430801).

3688231292391 is a wasteful number, since it uses less digits than its factorization.

3688231292391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229410430800.

The product of its digits is 6718464, while the sum is 57.

The spelling of 3688231292391 in words is "three trillion, six hundred eighty-eight billion, two hundred thirty-one million, two hundred ninety-two thousand, three hundred ninety-one".