4138725691 has 4 divisors (see below), whose sum is σ = 4281440400. Its totient is φ = 3996010984.

The previous prime is 4138725677. The next prime is 4138725719. The reversal of 4138725691 is 1965278314.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1965278314 = 2 ⋅982639157.

It is a cyclic number.

It is not a de Polignac number, because 4138725691 - 2⁵ = 4138725659 is a prime.

It is a pancake number, because a pancake can be divided into 4138725691 parts by 90980 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4138725611) 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, 71357311 + ... + 71357368.

It is an arithmetic number, because the mean of its divisors is an integer number (1070360100).

Almost surely, 2^4138725691 is an apocalyptic number.

4138725691 is a deficient number, since it is larger than the sum of its proper divisors (142714709).

4138725691 is a wasteful number, since it uses less digits than its factorization.

4138725691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142714708.

The product of its digits is 362880, while the sum is 46.

The square root of 4138725691 is about 64332.9285125432. The cubic root of 4138725691 is about 1605.5440088070.

The spelling of 4138725691 in words is "four billion, one hundred thirty-eight million, seven hundred twenty-five thousand, six hundred ninety-one".