253501336645 has 4 divisors (see below), whose sum is σ = 304201603980. Its totient is φ = 202801069312.

The previous prime is 253501336591. The next prime is 253501336657. The reversal of 253501336645 is 546633105352.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34700983524 + 218800353121 = 186282^2 + 467761^2 .

It is a cyclic number.

It is not a de Polignac number, because 253501336645 - 2⁹ = 253501336133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25350133660 + ... + 25350133669.

It is an arithmetic number, because the mean of its divisors is an integer number (76050400995).

Almost surely, 2^253501336645 is an apocalyptic number.

It is an amenable number.

253501336645 is a deficient number, since it is larger than the sum of its proper divisors (50700267335).

253501336645 is an equidigital number, since it uses as much as digits as its factorization.

253501336645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50700267334.

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 253501336645 in words is "two hundred fifty-three billion, five hundred one million, three hundred thirty-six thousand, six hundred forty-five".