291394731064 has 32 divisors (see below), whose sum is σ = 564897816000. Its totient is φ = 140808170880.

The previous prime is 291394731053. The next prime is 291394731107. The reversal of 291394731064 is 460137493192.

It is a junction number, because it is equal to n+sod(n) for n = 291394730999 and 291394731017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3259392 + ... + 3347599.

It is an arithmetic number, because the mean of its divisors is an integer number (17653056750).

Almost surely, 2^291394731064 is an apocalyptic number.

It is an amenable number.

291394731064 is a deficient number, since it is larger than the sum of its proper divisors (273503084936).

291394731064 is a wasteful number, since it uses less digits than its factorization.

291394731064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607183 (or 6607179 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 291394731064 in words is "two hundred ninety-one billion, three hundred ninety-four million, seven hundred thirty-one thousand, sixty-four".