6407491187 has 8 divisors (see below), whose sum is σ = 6557559120. Its totient is φ = 6259158400.

The previous prime is 6407491151. The next prime is 6407491213. The reversal of 6407491187 is 7811947046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6407491187 - 2¹⁰ = 6407490163 is a prime.

It is a super-2 number, since 2×6407491187² = 82111886622965337938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6407491147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426314 + ... + 441087.

It is an arithmetic number, because the mean of its divisors is an integer number (819694890).

Almost surely, 2^6407491187 is an apocalyptic number.

6407491187 is a deficient number, since it is larger than the sum of its proper divisors (150067933).

6407491187 is an equidigital number, since it uses as much as digits as its factorization.

6407491187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867573.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 6407491187 is about 80046.8062261075. The cubic root of 6407491187 is about 1857.3596470343.

The spelling of 6407491187 in words is "six billion, four hundred seven million, four hundred ninety-one thousand, one hundred eighty-seven".