1253906563555 has 8 divisors (see below), whose sum is σ = 1504713573792. Its totient is φ = 1003108119168.

The previous prime is 1253906563543. The next prime is 1253906563573. The reversal of 1253906563555 is 5553656093521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1253906563555 - 2¹¹ = 1253906561507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253906563496 and 1253906563505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814887 + ... + 2408656.

It is an arithmetic number, because the mean of its divisors is an integer number (188089196724).

Almost surely, 2^{1253906563555} is an apocalyptic number.

1253906563555 is a deficient number, since it is larger than the sum of its proper divisors (250807010237).

1253906563555 is an equidigital number, since it uses as much as digits as its factorization.

1253906563555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282925.

The product of its (nonzero) digits is 18225000, while the sum is 55.

The spelling of 1253906563555 in words is "one trillion, two hundred fifty-three billion, nine hundred six million, five hundred sixty-three thousand, five hundred fifty-five".