6440637714 has 48 divisors (see below), whose sum is σ = 15865784928. Its totient is φ = 1731934848.

The previous prime is 6440637713. The next prime is 6440637737. The reversal of 6440637714 is 4177360446.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (6440637713) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 639324 + ... + 649319.

It is an arithmetic number, because the mean of its divisors is an integer number (330537186).

Almost surely, 2^6440637714 is an apocalyptic number.

6440637714 is an abundant number, since it is smaller than the sum of its proper divisors (9425147214).

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

6440637714 is a wasteful number, since it uses less digits than its factorization.

6440637714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288679 (or 1288672 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The square root of 6440637714 is about 80253.5838078275. The cubic root of 6440637714 is about 1860.5569028444.

The spelling of 6440637714 in words is "six billion, four hundred forty million, six hundred thirty-seven thousand, seven hundred fourteen".