253889405951 has 4 divisors (see below), whose sum is σ = 254106221304. Its totient is φ = 253672590600.

The previous prime is 253889405921. The next prime is 253889405953. The reversal of 253889405951 is 159504988352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253889405951 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 (253889405953) 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, 108405920 + ... + 108408261.

It is an arithmetic number, because the mean of its divisors is an integer number (63526555326).

Almost surely, 2^253889405951 is an apocalyptic number.

253889405951 is a deficient number, since it is larger than the sum of its proper divisors (216815353).

253889405951 is a wasteful number, since it uses less digits than its factorization.

253889405951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216815352.

The product of its (nonzero) digits is 15552000, while the sum is 59.

The spelling of 253889405951 in words is "two hundred fifty-three billion, eight hundred eighty-nine million, four hundred five thousand, nine hundred fifty-one".