4023457657 has 4 divisors (see below), whose sum is σ = 4024425076. Its totient is φ = 4022490240.

The previous prime is 4023457649. The next prime is 4023457661. The reversal of 4023457657 is 7567543204.

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 1853388601 + 2170069056 = 43051^2 + 46584^2 .

It is a cyclic number.

It is not a de Polignac number, because 4023457657 - 2³ = 4023457649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4023457637) 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, 477444 + ... + 485797.

It is an arithmetic number, because the mean of its divisors is an integer number (1006106269).

Almost surely, 2^4023457657 is an apocalyptic number.

It is an amenable number.

4023457657 is a deficient number, since it is larger than the sum of its proper divisors (967419).

4023457657 is an equidigital number, since it uses as much as digits as its factorization.

4023457657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967418.

The product of its (nonzero) digits is 705600, while the sum is 43.

The square root of 4023457657 is about 63430.7311718854. The cubic root of 4023457657 is about 1590.4980648958.

The spelling of 4023457657 in words is "four billion, twenty-three million, four hundred fifty-seven thousand, six hundred fifty-seven".