2081398637 has 8 divisors (see below), whose sum is σ = 2117400000. Its totient is φ = 2045421504.

The previous prime is 2081398603. The next prime is 2081398651. The reversal of 2081398637 is 7368931802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2081398637 - 2²² = 2077204333 is a prime.

It is a super-2 number, since 2×2081398637² = 8664440572210915538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2081398591 and 2081398600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081398687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291413 + ... + 298469.

It is an arithmetic number, because the mean of its divisors is an integer number (264675000).

Almost surely, 2^2081398637 is an apocalyptic number.

It is an amenable number.

2081398637 is a deficient number, since it is larger than the sum of its proper divisors (36001363).

2081398637 is an equidigital number, since it uses as much as digits as its factorization.

2081398637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12115.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 2081398637 is about 45622.3479996372. The cubic root of 2081398637 is about 1276.7869112641.

The spelling of 2081398637 in words is "two billion, eighty-one million, three hundred ninety-eight thousand, six hundred thirty-seven".