791811646 has 4 divisors (see below), whose sum is σ = 1187717472. Its totient is φ = 395905822.

The previous prime is 791811623. The next prime is 791811661. The reversal of 791811646 is 646118197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646118197 = 10243 ⋅63079.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197952910 + ... + 197952913.

It is an arithmetic number, because the mean of its divisors is an integer number (296929368).

Almost surely, 2^791811646 is an apocalyptic number.

791811646 is a deficient number, since it is larger than the sum of its proper divisors (395905826).

791811646 is a wasteful number, since it uses less digits than its factorization.

791811646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395905825.

The product of its digits is 72576, while the sum is 43.

The square root of 791811646 is about 28139.1479259767. The cubic root of 791811646 is about 925.1396510847.

The spelling of 791811646 in words is "seven hundred ninety-one million, eight hundred eleven thousand, six hundred forty-six".