2621165652 has 144 divisors (see below), whose sum is σ = 7961571072. Its totient is φ = 710899200.

The previous prime is 2621165543. The next prime is 2621165671. The reversal of 2621165652 is 2565611262.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 792402 + ... + 795702.

It is an arithmetic number, because the mean of its divisors is an integer number (55288688).

Almost surely, 2^2621165652 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 2621165652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3980785536).

2621165652 is an abundant number, since it is smaller than the sum of its proper divisors (5340405420).

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

2621165652 is a wasteful number, since it uses less digits than its factorization.

2621165652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3473 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 2621165652 is about 51197.3207502111. The cubic root of 2621165652 is about 1378.7900989618.

The spelling of 2621165652 in words is "two billion, six hundred twenty-one million, one hundred sixty-five thousand, six hundred fifty-two".