252938511691 has 4 divisors (see below), whose sum is σ = 252971630800. Its totient is φ = 252905392584.

The previous prime is 252938511641. The next prime is 252938511737. The reversal of 252938511691 is 196115839252.

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 252938511691 - 2³⁷ = 115499558219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252938511641) 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, 16548096 + ... + 16563373.

It is an arithmetic number, because the mean of its divisors is an integer number (63242907700).

Almost surely, 2^252938511691 is an apocalyptic number.

252938511691 is a deficient number, since it is larger than the sum of its proper divisors (33119109).

252938511691 is an equidigital number, since it uses as much as digits as its factorization.

252938511691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33119108.

The product of its digits is 1166400, while the sum is 52.

The spelling of 252938511691 in words is "two hundred fifty-two billion, nine hundred thirty-eight million, five hundred eleven thousand, six hundred ninety-one".