291936106681660 has 48 divisors (see below), whose sum is σ = 700751373073920. Its totient is φ = 100077419856960.

The previous prime is 291936106681603. The next prime is 291936106681663. The reversal of 291936106681660 is 66186601639192.

It is a junction number, because it is equal to n+sod(n) for n = 291936106681592 and 291936106681601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291936106681663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154888840 + ... + 156762319.

It is an arithmetic number, because the mean of its divisors is an integer number (14598986939040).

Almost surely, 2^{291936106681660} is an apocalyptic number.

291936106681660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291936106681660 is an abundant number, since it is smaller than the sum of its proper divisors (408815266392260).

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

291936106681660 is a wasteful number, since it uses less digits than its factorization.

291936106681660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311657866 (or 311657864 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 64.

The spelling of 291936106681660 in words is "two hundred ninety-one trillion, nine hundred thirty-six billion, one hundred six million, six hundred eighty-one thousand, six hundred sixty".