263251507472642 has 8 divisors (see below), whose sum is σ = 425252435148156. Its totient is φ = 121500695756592.

The previous prime is 263251507472563. The next prime is 263251507472743. The reversal of 263251507472642 is 246274705152362.

It can be written as a sum of positive squares in 2 ways, for example, as 253355632288201 + 9895875184441 = 15917149^2 + 3145771^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5062528989833 + ... + 5062528989884.

Almost surely, 2^{263251507472642} is an apocalyptic number.

263251507472642 is a deficient number, since it is larger than the sum of its proper divisors (162000927675514).

263251507472642 is a wasteful number, since it uses less digits than its factorization.

263251507472642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125057979732.

The product of its (nonzero) digits is 33868800, while the sum is 56.

The spelling of 263251507472642 in words is "two hundred sixty-three trillion, two hundred fifty-one billion, five hundred seven million, four hundred seventy-two thousand, six hundred forty-two".