291211642816492 has 6 divisors (see below), whose sum is σ = 509620374928868. Its totient is φ = 145605821408244.

The previous prime is 291211642816463. The next prime is 291211642816511. The reversal of 291211642816492 is 294618246112192.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36401455352058 + ... + 36401455352065.

Almost surely, 2^{291211642816492} is an apocalyptic number.

It is an amenable number.

291211642816492 is a deficient number, since it is larger than the sum of its proper divisors (218408732112376).

291211642816492 is a wasteful number, since it uses less digits than its factorization.

291211642816492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72802910704127 (or 72802910704125 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 58.

The spelling of 291211642816492 in words is "two hundred ninety-one trillion, two hundred eleven billion, six hundred forty-two million, eight hundred sixteen thousand, four hundred ninety-two".