2645002140 has 96 divisors (see below), whose sum is σ = 8159477760. Its totient is φ = 634848000.

The previous prime is 2645002067. The next prime is 2645002147. The reversal of 2645002140 is 412005462.

It is a self number, because there is not a number n which added to its sum of digits gives 2645002140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645002147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46821 + ... + 86499.

It is an arithmetic number, because the mean of its divisors is an integer number (84994560).

Almost surely, 2^2645002140 is an apocalyptic number.

2645002140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645002140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4079738880).

2645002140 is an abundant number, since it is smaller than the sum of its proper divisors (5514475620).

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

2645002140 is a wasteful number, since it uses less digits than its factorization.

2645002140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39803 (or 39801 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2645002140 is about 51429.5842876452. The cubic root of 2645002140 is about 1382.9569968994.

The spelling of 2645002140 in words is "two billion, six hundred forty-five million, two thousand, one hundred forty".