2891457431492 has 24 divisors (see below), whose sum is σ = 5852588540736. Its totient is φ = 1224265968288.

The previous prime is 2891457431479. The next prime is 2891457431509. The reversal of 2891457431492 is 2941347541982.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 622084043 + ... + 622088690.

It is an arithmetic number, because the mean of its divisors is an integer number (243857855864).

Almost surely, 2^{2891457431492} is an apocalyptic number.

It is an amenable number.

2891457431492 is an abundant number, since it is smaller than the sum of its proper divisors (2961131109244).

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

2891457431492 is a wasteful number, since it uses less digits than its factorization.

2891457431492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244172827 (or 1244172825 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 59.

The spelling of 2891457431492 in words is "two trillion, eight hundred ninety-one billion, four hundred fifty-seven million, four hundred thirty-one thousand, four hundred ninety-two".