791099435840 has 112 divisors (see below), whose sum is σ = 2222369854464. Its totient is φ = 262484582400.

The previous prime is 791099435773. The next prime is 791099435843. The reversal of 791099435840 is 48534990197.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 791099435840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791099435843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5626841 + ... + 5765720.

Almost surely, 2^791099435840 is an apocalyptic number.

791099435840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

791099435840 is an abundant number, since it is smaller than the sum of its proper divisors (1431270418624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

791099435840 is a wasteful number, since it uses less digits than its factorization.

791099435840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11392616 (or 11392606 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 791099435840 in words is "seven hundred ninety-one billion, ninety-nine million, four hundred thirty-five thousand, eight hundred forty".