291287101667056 has 60 divisors (see below), whose sum is σ = 622002324322456. Its totient is φ = 132048259263360.

The previous prime is 291287101667053. The next prime is 291287101667099. The reversal of 291287101667056 is 650766101782192.

It is a junction number, because it is equal to n+sod(n) for n = 291287101666985 and 291287101667003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291287101667053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200964486 + ... + 202408741.

Almost surely, 2^{291287101667056} is an apocalyptic number.

It is an amenable number.

291287101667056 is an abundant number, since it is smaller than the sum of its proper divisors (330715222655400).

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

291287101667056 is a wasteful number, since it uses less digits than its factorization.

291287101667056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403373630 (or 403373613 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 61.

The spelling of 291287101667056 in words is "two hundred ninety-one trillion, two hundred eighty-seven billion, one hundred one million, six hundred sixty-seven thousand, fifty-six".