4692121681 has 4 divisors (see below), whose sum is σ = 5053054132. Its totient is φ = 4331189232.

The previous prime is 4692121657. The next prime is 4692121697. The reversal of 4692121681 is 1861212964.

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 2733616656 + 1958505025 = 52284^2 + 44255^2 .

It is a cyclic number.

It is not a de Polignac number, because 4692121681 - 2²⁷ = 4557903953 is a prime.

It is a super-2 number, since 2×4692121681² = 44032011738620531522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4692121481) 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, 180466206 + ... + 180466231.

It is an arithmetic number, because the mean of its divisors is an integer number (1263263533).

Almost surely, 2^4692121681 is an apocalyptic number.

It is an amenable number.

4692121681 is a deficient number, since it is larger than the sum of its proper divisors (360932451).

4692121681 is a wasteful number, since it uses less digits than its factorization.

4692121681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360932450.

The product of its digits is 41472, while the sum is 40.

The square root of 4692121681 is about 68499.0633585599. The cubic root of 4692121681 is about 1674.1322221889.

The spelling of 4692121681 in words is "four billion, six hundred ninety-two million, one hundred twenty-one thousand, six hundred eighty-one".