253044521555 has 64 divisors (see below), whose sum is σ = 356377190400. Its totient is φ = 168900526080.

The previous prime is 253044521473. The next prime is 253044521573. The reversal of 253044521555 is 555125440352.

It is not a de Polignac number, because 253044521555 - 2⁸ = 253044521299 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 255342110 + ... + 255343100.

It is an arithmetic number, because the mean of its divisors is an integer number (5568393600).

Almost surely, 2^253044521555 is an apocalyptic number.

253044521555 is a deficient number, since it is larger than the sum of its proper divisors (103332668845).

253044521555 is a wasteful number, since it uses less digits than its factorization.

253044521555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004.

The product of its (nonzero) digits is 600000, while the sum is 41.

The spelling of 253044521555 in words is "two hundred fifty-three billion, forty-four million, five hundred twenty-one thousand, five hundred fifty-five".