253953507845 has 8 divisors (see below), whose sum is σ = 304809787800. Its totient is φ = 203119087360.

The previous prime is 253953507839. The next prime is 253953507883. The reversal of 253953507845 is 548705359352.

It is a Cunningham number, because it is equal to 503938²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 57668180164 + 196285327681 = 240142^2 + 443041^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253953507845 - 2⁸ = 253953507589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5439296 + ... + 5485785.

It is an arithmetic number, because the mean of its divisors is an integer number (38101223475).

Almost surely, 2^253953507845 is an apocalyptic number.

It is an amenable number.

253953507845 is a deficient number, since it is larger than the sum of its proper divisors (50856279955).

253953507845 is a wasteful number, since it uses less digits than its factorization.

253953507845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10929735.

The product of its (nonzero) digits is 22680000, while the sum is 56.

The spelling of 253953507845 in words is "two hundred fifty-three billion, nine hundred fifty-three million, five hundred seven thousand, eight hundred forty-five".