291118066680 has 256 divisors, whose sum is σ = 1016281728000. Its totient is φ = 65333219328.

The previous prime is 291118066651. The next prime is 291118066699. The reversal of 291118066680 is 86660811192.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46434586 + ... + 46440854.

It is an arithmetic number, because the mean of its divisors is an integer number (3969850500).

Almost surely, 2^291118066680 is an apocalyptic number.

291118066680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 291118066680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508140864000).

291118066680 is an abundant number, since it is smaller than the sum of its proper divisors (725163661320).

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

291118066680 is a wasteful number, since it uses less digits than its factorization.

291118066680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286 (or 7282 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 48.

The spelling of 291118066680 in words is "two hundred ninety-one billion, one hundred eighteen million, sixty-six thousand, six hundred eighty".