2109636725 has 24 divisors (see below), whose sum is σ = 2991588288. Its totient is φ = 1445673600.

The previous prime is 2109636667. The next prime is 2109636731. The reversal of 2109636725 is 5276369012.

It is not a de Polignac number, because 2109636725 - 2¹⁸ = 2109374581 is a prime.

It is a super-2 number, since 2×2109636725² = 8901134222937451250, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 370097 + ... + 375753.

It is an arithmetic number, because the mean of its divisors is an integer number (124649512).

Almost surely, 2^2109636725 is an apocalyptic number.

2109636725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2109636725 is a deficient number, since it is larger than the sum of its proper divisors (881951563).

2109636725 is a wasteful number, since it uses less digits than its factorization.

2109636725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805 (or 7800 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 2109636725 is about 45930.7818897088. The cubic root of 2109636725 is about 1282.5350000011.

The spelling of 2109636725 in words is "two billion, one hundred nine million, six hundred thirty-six thousand, seven hundred twenty-five".