2104681577 has 4 divisors (see below), whose sum is σ = 2156015316. Its totient is φ = 2053347840.

The previous prime is 2104681567. The next prime is 2104681589. The reversal of 2104681577 is 7751864012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1027266601 + 1077414976 = 32051^2 + 32824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104681577 - 2⁸ = 2104681321 is a prime.

It is a super-4 number, since 4×2104681577⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 51333697 = 2104681577 / (2 + 1 + 0 + 4 + 6 + 8 + 1 + 5 + 7 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104681517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25666808 + ... + 25666889.

It is an arithmetic number, because the mean of its divisors is an integer number (539003829).

Almost surely, 2^2104681577 is an apocalyptic number.

It is an amenable number.

2104681577 is a deficient number, since it is larger than the sum of its proper divisors (51333739).

2104681577 is an equidigital number, since it uses as much as digits as its factorization.

2104681577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51333738.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 2104681577 is about 45876.8087054887. The cubic root of 2104681577 is about 1281.5300666461.

The spelling of 2104681577 in words is "two billion, one hundred four million, six hundred eighty-one thousand, five hundred seventy-seven".