7981131338554 has 16 divisors (see below), whose sum is σ = 13254958969056. Its totient is φ = 3573640897200.

The previous prime is 7981131338539. The next prime is 7981131338567. The reversal of 7981131338554 is 4558331311897.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2707302237 + ... + 2707305184.

It is an arithmetic number, because the mean of its divisors is an integer number (828434935566).

Almost surely, 2^{7981131338554} is an apocalyptic number.

7981131338554 is a deficient number, since it is larger than the sum of its proper divisors (5273827630502).

7981131338554 is a wasteful number, since it uses less digits than its factorization.

7981131338554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5414607501.

The product of its digits is 10886400, while the sum is 58.

The spelling of 7981131338554 in words is "seven trillion, nine hundred eighty-one billion, one hundred thirty-one million, three hundred thirty-eight thousand, five hundred fifty-four".