2002644156 has 24 divisors (see below), whose sum is σ = 4918775680. Its totient is φ = 632413872.

The previous prime is 2002644151. The next prime is 2002644173. The reversal of 2002644156 is 6514462002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002644151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4391536 + ... + 4391991.

Almost surely, 2^2002644156 is an apocalyptic number.

It is an amenable number.

2002644156 is an abundant number, since it is smaller than the sum of its proper divisors (2916131524).

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

2002644156 is a wasteful number, since it uses less digits than its factorization.

2002644156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8783553 (or 8783551 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2002644156 is about 44750.9123482416. The cubic root of 2002644156 is about 1260.4760433524.

The spelling of 2002644156 in words is "two billion, two million, six hundred forty-four thousand, one hundred fifty-six".