253665446505 has 16 divisors (see below), whose sum is σ = 405966200640. Its totient is φ = 135254409408.

The previous prime is 253665446483. The next prime is 253665446579. The reversal of 253665446505 is 505644566352.

It is not a de Polignac number, because 253665446505 - 2⁸ = 253665446249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052250 + ... + 2172339.

It is an arithmetic number, because the mean of its divisors is an integer number (25372887540).

Almost surely, 2^253665446505 is an apocalyptic number.

It is an amenable number.

253665446505 is a deficient number, since it is larger than the sum of its proper divisors (152300754135).

253665446505 is a wasteful number, since it uses less digits than its factorization.

253665446505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228600.

The product of its (nonzero) digits is 12960000, while the sum is 51.

The spelling of 253665446505 in words is "two hundred fifty-three billion, six hundred sixty-five million, four hundred forty-six thousand, five hundred five".