2656172903 has 4 divisors (see below), whose sum is σ = 2664825240. Its totient is φ = 2647520568.

The previous prime is 2656172879. The next prime is 2656172921. The reversal of 2656172903 is 3092716562.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2656172903 - 2¹⁸ = 2655910759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656172923) 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, 4325708 + ... + 4326321.

It is an arithmetic number, because the mean of its divisors is an integer number (666206310).

Almost surely, 2^2656172903 is an apocalyptic number.

2656172903 is a deficient number, since it is larger than the sum of its proper divisors (8652337).

2656172903 is an equidigital number, since it uses as much as digits as its factorization.

2656172903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8652336.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 2656172903 is about 51538.0723640301. The cubic root of 2656172903 is about 1384.9011651246.

The spelling of 2656172903 in words is "two billion, six hundred fifty-six million, one hundred seventy-two thousand, nine hundred three".