291908961796 has 9 divisors (see below), whose sum is σ = 510842574151. Its totient is φ = 145953940612.

The previous prime is 291908961781. The next prime is 291908961809. The reversal of 291908961796 is 697169809192.

The square root of 291908961796 is 540286.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 945501 + ... + 1215643.

Almost surely, 2^291908961796 is an apocalyptic number.

291908961796 is the 540286-th square number.

It is an amenable number.

291908961796 is a deficient number, since it is larger than the sum of its proper divisors (218933612355).

291908961796 is an frugal number, since it uses more digits than its factorization.

291908961796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540290 (or 270145 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 67.

The spelling of 291908961796 in words is "two hundred ninety-one billion, nine hundred eight million, nine hundred sixty-one thousand, seven hundred ninety-six".