4138697646 has 32 divisors (see below), whose sum is σ = 9202461600. Its totient is φ = 1378762560.

The previous prime is 4138697623. The next prime is 4138697653. The reversal of 4138697646 is 6467968314.

4138697646 is a `hidden beast` number, since 413 + 86 + 97 + 64 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 4138697592 and 4138697601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75186 + ... + 118026.

It is an arithmetic number, because the mean of its divisors is an integer number (287576925).

Almost surely, 2^4138697646 is an apocalyptic number.

4138697646 is an abundant number, since it is smaller than the sum of its proper divisors (5063763954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4138697646 is a wasteful number, since it uses less digits than its factorization.

4138697646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44641 (or 44635 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 4138697646 is about 64332.7105444812. The cubic root of 4138697646 is about 1605.5403822814.

The spelling of 4138697646 in words is "four billion, one hundred thirty-eight million, six hundred ninety-seven thousand, six hundred forty-six".