2656123505 has 16 divisors (see below), whose sum is σ = 3643521024. Its totient is φ = 1820923200.

The previous prime is 2656123499. The next prime is 2656123511. The reversal of 2656123505 is 5053216562.

2656123505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2656123499) and next prime (2656123511).

It is not a de Polignac number, because 2656123505 - 2⁴ = 2656123489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian 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, 285680 + ... + 294830.

It is an arithmetic number, because the mean of its divisors is an integer number (227720064).

Almost surely, 2^2656123505 is an apocalyptic number.

It is an amenable number.

2656123505 is a deficient number, since it is larger than the sum of its proper divisors (987397519).

2656123505 is an equidigital number, since it uses as much as digits as its factorization.

2656123505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 2656123505 is about 51537.5931238547. The cubic root of 2656123505 is about 1384.8925798688.

The spelling of 2656123505 in words is "two billion, six hundred fifty-six million, one hundred twenty-three thousand, five hundred five".