253496938921 has 4 divisors (see below), whose sum is σ = 256551118992. Its totient is φ = 250442758852.

The previous prime is 253496938901. The next prime is 253496938949. The reversal of 253496938921 is 129839694352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253496938921 - 2¹⁵ = 253496906153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253496938921.

It is not an unprimeable number, because it can be changed into a prime (253496938901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1527089911 + ... + 1527090076.

It is an arithmetic number, because the mean of its divisors is an integer number (64137779748).

Almost surely, 2^253496938921 is an apocalyptic number.

It is an amenable number.

253496938921 is a deficient number, since it is larger than the sum of its proper divisors (3054180071).

253496938921 is an equidigital number, since it uses as much as digits as its factorization.

253496938921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054180070.

The product of its digits is 25194240, while the sum is 61.

The spelling of 253496938921 in words is "two hundred fifty-three billion, four hundred ninety-six million, nine hundred thirty-eight thousand, nine hundred twenty-one".