791275139928 has 224 divisors, whose sum is σ = 2737778752800. Its totient is φ = 208687809024.

The previous prime is 791275139923. The next prime is 791275139929. The reversal of 791275139928 is 829931572197.

791275139928 is a `hidden beast` number, since 7 + 9 + 1 + 2 + 7 + 513 + 99 + 28 = 666.

It is a super-2 number, since 2×791275139928² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791275139923) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 214773 + ... + 1276196.

It is an arithmetic number, because the mean of its divisors is an integer number (12222226575).

Almost surely, 2^791275139928 is an apocalyptic number.

791275139928 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 791275139928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368889376400).

791275139928 is an abundant number, since it is smaller than the sum of its proper divisors (1946503612872).

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

791275139928 is a wasteful number, since it uses less digits than its factorization.

791275139928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491013 (or 1490994 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

The spelling of 791275139928 in words is "seven hundred ninety-one billion, two hundred seventy-five million, one hundred thirty-nine thousand, nine hundred twenty-eight".