1253401036566 has 64 divisors (see below), whose sum is σ = 2989722009600. Its totient is φ = 342516452256.

The previous prime is 1253401036507. The next prime is 1253401036583. The reversal of 1253401036566 is 6656301043521.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13631775 + ... + 13723413.

It is an arithmetic number, because the mean of its divisors is an integer number (46714406400).

Almost surely, 2^{1253401036566} is an apocalyptic number.

1253401036566 is an abundant number, since it is smaller than the sum of its proper divisors (1736320973034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253401036566 is a wasteful number, since it uses less digits than its factorization.

1253401036566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105833.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 1253401036566 in words is "one trillion, two hundred fifty-three billion, four hundred one million, thirty-six thousand, five hundred sixty-six".