2081564372 has 12 divisors (see below), whose sum is σ = 3663795156. Its totient is φ = 1034765760.

The previous prime is 2081564369. The next prime is 2081564393. The reversal of 2081564372 is 2734651802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1226820676 + 854743696 = 35026^2 + 29236^2 .

It is a super-4 number, since 4×2081564372⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1503329 + ... + 1504712.

It is an arithmetic number, because the mean of its divisors is an integer number (305316263).

Almost surely, 2^2081564372 is an apocalyptic number.

It is an amenable number.

2081564372 is a deficient number, since it is larger than the sum of its proper divisors (1582230784).

2081564372 is a wasteful number, since it uses less digits than its factorization.

2081564372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008218 (or 3008216 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 2081564372 is about 45624.1643430321. The cubic root of 2081564372 is about 1276.8207991602.

The spelling of 2081564372 in words is "two billion, eighty-one million, five hundred sixty-four thousand, three hundred seventy-two".