2799121536 has 160 divisors (see below), whose sum is σ = 8820703980. Its totient is φ = 878100480.

The previous prime is 2799121517. The next prime is 2799121541. The reversal of 2799121536 is 6351219972.

It is a happy number.

2799121536 is a `hidden beast` number, since 2 + 7 + 9 + 91 + 21 + 536 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2347983936 + 451137600 = 48456^2 + 21240^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2799121491 and 2799121500.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 168316 + ... + 184196.

Almost surely, 2^2799121536 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 2799121536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4410351990).

2799121536 is an abundant number, since it is smaller than the sum of its proper divisors (6021582444).

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

2799121536 is a wasteful number, since it uses less digits than its factorization.

2799121536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15924 (or 15903 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 2799121536 is about 52906.7248655594. The cubic root of 2799121536 is about 1409.3123310374.

The spelling of 2799121536 in words is "two billion, seven hundred ninety-nine million, one hundred twenty-one thousand, five hundred thirty-six".