6437376491 has 32 divisors (see below), whose sum is σ = 8359196160. Its totient is φ = 4814090496.

The previous prime is 6437376487. The next prime is 6437376511. The reversal of 6437376491 is 1946737346.

It is a happy number.

It is not a de Polignac number, because 6437376491 - 2² = 6437376487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6437376461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 786080 + ... + 794226.

It is an arithmetic number, because the mean of its divisors is an integer number (261224880).

Almost surely, 2^6437376491 is an apocalyptic number.

6437376491 is a deficient number, since it is larger than the sum of its proper divisors (1921819669).

6437376491 is a wasteful number, since it uses less digits than its factorization.

6437376491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8643.

The product of its digits is 2286144, while the sum is 50.

The square root of 6437376491 is about 80233.2629960916. The cubic root of 6437376491 is about 1860.2428182434.

The spelling of 6437376491 in words is "six billion, four hundred thirty-seven million, three hundred seventy-six thousand, four hundred ninety-one".