2999421656 has 128 divisors (see below), whose sum is σ = 7597877760. Its totient is φ = 1074124800.

The previous prime is 2999421589. The next prime is 2999421679. The reversal of 2999421656 is 6561249992.

It is a happy number.

2999421656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2999421598 and 2999421607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446966 + ... + 453626.

It is an arithmetic number, because the mean of its divisors is an integer number (59358420).

Almost surely, 2^2999421656 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 2999421656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3798938880).

2999421656 is an abundant number, since it is smaller than the sum of its proper divisors (4598456104).

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

2999421656 is a wasteful number, since it uses less digits than its factorization.

2999421656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745 (or 6741 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 2999421656 is about 54766.9759617965. The cubic root of 2999421656 is about 1442.1568847528.

The spelling of 2999421656 in words is "two billion, nine hundred ninety-nine million, four hundred twenty-one thousand, six hundred fifty-six".