253387009705 has 8 divisors (see below), whose sum is σ = 309049074504. Its totient is φ = 199386499200.

The previous prime is 253387009699. The next prime is 253387009709. The reversal of 253387009705 is 507900783352.

It can be written as a sum of positive squares in 4 ways, for example, as 8657930304 + 244729079401 = 93048^2 + 494701^2 .

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

It is not a de Polignac number, because 253387009705 - 2¹⁵ = 253386976937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253387009709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415388236 + ... + 415388845.

It is an arithmetic number, because the mean of its divisors is an integer number (38631134313).

Almost surely, 2^253387009705 is an apocalyptic number.

It is an amenable number.

253387009705 is a deficient number, since it is larger than the sum of its proper divisors (55662064799).

253387009705 is an equidigital number, since it uses as much as digits as its factorization.

253387009705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830777147.

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 253387009705 in words is "two hundred fifty-three billion, three hundred eighty-seven million, nine thousand, seven hundred five".