791855853126840 has 384 divisors, whose sum is σ = 2696382283345920. Its totient is φ = 201286189209600.

The previous prime is 791855853126787. The next prime is 791855853126847. The reversal of 791855853126840 is 48621358558197.

It is a happy number.

791855853126840 is a `hidden beast` number, since 7 + 9 + 1 + 8 + 5 + 5 + 8 + 531 + 2 + 6 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (791855853126847) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15343936317 + ... + 15343987923.

It is an arithmetic number, because the mean of its divisors is an integer number (7021828862880).

It is a 1-persistent number, because it is pandigital, but 2⋅791855853126840 = 1583711706253680 is not.

Almost surely, 2^{791855853126840} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 791855853126840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348191141672960).

791855853126840 is an abundant number, since it is smaller than the sum of its proper divisors (1904526430219080).

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

791855853126840 is a wasteful number, since it uses less digits than its factorization.

791855853126840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72243 (or 72236 counting only the distinct ones).

The product of its (nonzero) digits is 580608000, while the sum is 72.

The spelling of 791855853126840 in words is "seven hundred ninety-one trillion, eight hundred fifty-five billion, eight hundred fifty-three million, one hundred twenty-six thousand, eight hundred forty".