291689791690764 has 12 divisors (see below), whose sum is σ = 680609513945144. Its totient is φ = 97229930563584.

The previous prime is 291689791690711. The next prime is 291689791690769. The reversal of 291689791690764 is 467096197986192.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (291689791690769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12153741320437 + ... + 12153741320460.

Almost surely, 2^{291689791690764} is an apocalyptic number.

It is an amenable number.

291689791690764 is an abundant number, since it is smaller than the sum of its proper divisors (388919722254380).

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

291689791690764 is a wasteful number, since it uses less digits than its factorization.

291689791690764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24307482640904 (or 24307482640902 counting only the distinct ones).

The product of its (nonzero) digits is 4444263936, while the sum is 84.

The spelling of 291689791690764 in words is "two hundred ninety-one trillion, six hundred eighty-nine billion, seven hundred ninety-one million, six hundred ninety thousand, seven hundred sixty-four".