791443139520 has 224 divisors, whose sum is σ = 2885549402880. Its totient is φ = 181766799360.

The previous prime is 791443139507. The next prime is 791443139521. The reversal of 791443139520 is 25931344197.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 791443139520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791443139521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1771657 + ... + 2172936.

Almost surely, 2^791443139520 is an apocalyptic number.

It is an amenable number.

791443139520 is an abundant number, since it is smaller than the sum of its proper divisors (2094106263360).

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

791443139520 is a wasteful number, since it uses less digits than its factorization.

791443139520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944643 (or 3944633 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 48.

The spelling of 791443139520 in words is "seven hundred ninety-one billion, four hundred forty-three million, one hundred thirty-nine thousand, five hundred twenty".