791861497956 has 99 divisors (see below), whose sum is σ = 2079760558323. Its totient is φ = 263809674360.

The previous prime is 791861497949. The next prime is 791861497957. The reversal of 791861497956 is 659794168197.

The square root of 791861497956 is 889866.

It is a perfect power (a square), and thus also a powerful number.

791861497956 is a `hidden beast` number, since 7 + 9 + 1 + 86 + 1 + 497 + 9 + 56 = 666.

791861497956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (791861497957) by changing a digit.

It is a polite number, since it can be written in 32 ways as a sum of consecutive naturals, for example, 432473961 + ... + 432475791.

Almost surely, 2^791861497956 is an apocalyptic number.

791861497956 is the 889866-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 791861497956

791861497956 is an abundant number, since it is smaller than the sum of its proper divisors (1287899060367).

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

791861497956 is an frugal number, since it uses more digits than its factorization.

791861497956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696 (or 1836 counting only the distinct ones).

The product of its digits is 205752960, while the sum is 72.

The spelling of 791861497956 in words is "seven hundred ninety-one billion, eight hundred sixty-one million, four hundred ninety-seven thousand, nine hundred fifty-six".