79940531554 has 32 divisors (see below), whose sum is σ = 131255933760. Its totient is φ = 36291195072.

The previous prime is 79940531551. The next prime is 79940531611. The reversal of 79940531554 is 45513504997.

It is not an unprimeable number, because it can be changed into a prime (79940531551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156192 + ... + 1223380.

It is an arithmetic number, because the mean of its divisors is an integer number (4101747930).

Almost surely, 2^79940531554 is an apocalyptic number.

79940531554 is a deficient number, since it is larger than the sum of its proper divisors (51315402206).

79940531554 is a wasteful number, since it uses less digits than its factorization.

79940531554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67954.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 79940531554 in words is "seventy-nine billion, nine hundred forty million, five hundred thirty-one thousand, five hundred fifty-four".