4872091681 has 4 divisors (see below), whose sum is σ = 4907654532. Its totient is φ = 4836528832.

The previous prime is 4872091597. The next prime is 4872091687. The reversal of 4872091681 is 1861902784.

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 1540955025 + 3331136656 = 39255^2 + 57716^2 .

It is a cyclic number.

It is not a de Polignac number, because 4872091681 - 2¹¹ = 4872089633 is a prime.

It is a super-2 number, since 2×4872091681² = 47474554696138811522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4872091687) 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, 17781220 + ... + 17781493.

It is an arithmetic number, because the mean of its divisors is an integer number (1226913633).

Almost surely, 2^4872091681 is an apocalyptic number.

It is an amenable number.

4872091681 is a deficient number, since it is larger than the sum of its proper divisors (35562851).

4872091681 is a wasteful number, since it uses less digits than its factorization.

4872091681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35562850.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 4872091681 is about 69800.3702067546. The cubic root of 4872091681 is about 1695.2684672637.

The spelling of 4872091681 in words is "four billion, eight hundred seventy-two million, ninety-one thousand, six hundred eighty-one".