291463488920 has 16 divisors (see below), whose sum is σ = 655792850160. Its totient is φ = 116585395552.

The previous prime is 291463488863. The next prime is 291463488929. The reversal of 291463488920 is 29884364192.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291463488929) 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, 3643293572 + ... + 3643293651.

It is an arithmetic number, because the mean of its divisors is an integer number (40987053135).

Almost surely, 2^291463488920 is an apocalyptic number.

291463488920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

291463488920 is an abundant number, since it is smaller than the sum of its proper divisors (364329361240).

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

291463488920 is a wasteful number, since it uses less digits than its factorization.

291463488920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286587234 (or 7286587230 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 291463488920 in words is "two hundred ninety-one billion, four hundred sixty-three million, four hundred eighty-eight thousand, nine hundred twenty".