791521956 has 63 divisors (see below), whose sum is σ = 2080788913. Its totient is φ = 263334240.

The previous prime is 791521949. The next prime is 791521963. The reversal of 791521956 is 659125197.

The square root of 791521956 is 28134.

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

791521956 is a `hidden beast` number, since 79 + 1 + 521 + 9 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (791521949) and next prime (791521963).

It can be written as a sum of positive squares in only one way, i.e., 226984356 + 564537600 = 15066^2 + 23760^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 1518976 + ... + 1519496.

Almost surely, 2^791521956 is an apocalyptic number.

791521956 is the 28134-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 791521956

791521956 is an abundant number, since it is smaller than the sum of its proper divisors (1289266957).

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

791521956 is an frugal number, since it uses more digits than its factorization.

791521956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 526 counting only the distinct ones).

The product of its digits is 170100, while the sum is 45.

The cubic root of 791521956 is about 925.0268143189.

The spelling of 791521956 in words is "seven hundred ninety-one million, five hundred twenty-one thousand, nine hundred fifty-six".