6351640 has 16 divisors (see below), whose sum is σ = 14291280. Its totient is φ = 2540640.

The previous prime is 6351629. The next prime is 6351649. The reversal of 6351640 is 461536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6351649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79356 + ... + 79435.

It is an arithmetic number, because the mean of its divisors is an integer number (893205).

Almost surely, 2^6351640 is an apocalyptic number.

It is an amenable number.

6351640 is an abundant number, since it is smaller than the sum of its proper divisors (7939640).

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

6351640 is a wasteful number, since it uses less digits than its factorization.

6351640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158802 (or 158798 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6351640 is about 2520.2460197370. The cubic root of 6351640 is about 185.1947304314.

The spelling of 6351640 in words is "six million, three hundred fifty-one thousand, six hundred forty".