6440249179 has 32 divisors (see below), whose sum is σ = 8400986496. Its totient is φ = 4791121920.

The previous prime is 6440249171. The next prime is 6440249237. The reversal of 6440249179 is 9719420446.

It is not a de Polignac number, because 6440249179 - 2³ = 6440249171 is a prime.

It is a super-2 number, since 2×6440249179² = 82953618975220348082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6440249171) 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, 2877849 + ... + 2880085.

It is an arithmetic number, because the mean of its divisors is an integer number (262530828).

Almost surely, 2^6440249179 is an apocalyptic number.

6440249179 is a deficient number, since it is larger than the sum of its proper divisors (1960737317).

6440249179 is a wasteful number, since it uses less digits than its factorization.

6440249179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 6440249179 is about 80251.1631006056. The cubic root of 6440249179 is about 1860.5194890538.

The spelling of 6440249179 in words is "six billion, four hundred forty million, two hundred forty-nine thousand, one hundred seventy-nine".