6331755640 has 64 divisors (see below), whose sum is σ = 16299532800. Its totient is φ = 2168504448.

The previous prime is 6331755637. The next prime is 6331755649. The reversal of 6331755640 is 465571336.

It is a super-2 number, since 2×6331755640² = 80182258969343619200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 6331755593 and 6331755602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6331755649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253221 + ... + 277099.

It is an arithmetic number, because the mean of its divisors is an integer number (254680200).

Almost surely, 2^6331755640 is an apocalyptic number.

It is an amenable number.

6331755640 is an abundant number, since it is smaller than the sum of its proper divisors (9967777160).

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

6331755640 is a wasteful number, since it uses less digits than its factorization.

6331755640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24844 (or 24840 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 6331755640 is about 79572.3296127492. The cubic root of 6331755640 is about 1850.0127235551.

The spelling of 6331755640 in words is "six billion, three hundred thirty-one million, seven hundred fifty-five thousand, six hundred forty".