2391689929287 has 16 divisors (see below), whose sum is σ = 3236154768000. Its totient is φ = 1571005965024.

The previous prime is 2391689929253. The next prime is 2391689929313. The reversal of 2391689929287 is 7829299861932.

It is not a de Polignac number, because 2391689929287 - 2²² = 2391685734983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391689929687) 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, 20371737 + ... + 20488802.

It is an arithmetic number, because the mean of its divisors is an integer number (202259673000).

Almost surely, 2^{2391689929287} is an apocalyptic number.

2391689929287 is a deficient number, since it is larger than the sum of its proper divisors (844464838713).

2391689929287 is a wasteful number, since it uses less digits than its factorization.

2391689929287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40860830.

The product of its digits is 423263232, while the sum is 75.

The spelling of 2391689929287 in words is "two trillion, three hundred ninety-one billion, six hundred eighty-nine million, nine hundred twenty-nine thousand, two hundred eighty-seven".