10923123649 has 4 divisors (see below), whose sum is σ = 10923715540. Its totient is φ = 10922531760.

The previous prime is 10923123619. The next prime is 10923123667. The reversal of 10923123649 is 94632132901.

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 8773132225 + 2149991424 = 93665^2 + 46368^2 .

It is a cyclic number.

It is not a de Polignac number, because 10923123649 - 2⁷ = 10923123521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10923123619) 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, 267342 + ... + 305479.

It is an arithmetic number, because the mean of its divisors is an integer number (2730928885).

Almost surely, 2^10923123649 is an apocalyptic number.

It is an amenable number.

10923123649 is a deficient number, since it is larger than the sum of its proper divisors (591891).

10923123649 is an equidigital number, since it uses as much as digits as its factorization.

10923123649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591890.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 10923123649 in words is "ten billion, nine hundred twenty-three million, one hundred twenty-three thousand, six hundred forty-nine".