6501858656 has 48 divisors (see below), whose sum is σ = 13276505088. Its totient is φ = 3131049600.

The previous prime is 6501858619. The next prime is 6501858683. The reversal of 6501858656 is 6568581056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193781 + ... + 224843.

It is an arithmetic number, because the mean of its divisors is an integer number (276593856).

Almost surely, 2^6501858656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6501858656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6638252544).

6501858656 is an abundant number, since it is smaller than the sum of its proper divisors (6774646432).

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

6501858656 is a wasteful number, since it uses less digits than its factorization.

6501858656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31315 (or 31307 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 50.

The square root of 6501858656 is about 80634.1035542654. The cubic root of 6501858656 is about 1866.4334448987.

The spelling of 6501858656 in words is "six billion, five hundred one million, eight hundred fifty-eight thousand, six hundred fifty-six".