8081756131990 has 32 divisors (see below), whose sum is σ = 14562623592000. Its totient is φ = 3229266797568.

The previous prime is 8081756131987. The next prime is 8081756131991. The reversal of 8081756131990 is 991316571808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081756131991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239307826 + ... + 239341594.

It is an arithmetic number, because the mean of its divisors is an integer number (455081987250).

Almost surely, 2^{8081756131990} is an apocalyptic number.

8081756131990 is a deficient number, since it is larger than the sum of its proper divisors (6480867460010).

8081756131990 is a wasteful number, since it uses less digits than its factorization.

8081756131990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58504.

The product of its (nonzero) digits is 3265920, while the sum is 58.

The spelling of 8081756131990 in words is "eight trillion, eighty-one billion, seven hundred fifty-six million, one hundred thirty-one thousand, nine hundred ninety".