1253540435544 has 96 divisors (see below), whose sum is σ = 3408904502640. Its totient is φ = 416138630400.

The previous prime is 1253540435519. The next prime is 1253540435549. The reversal of 1253540435544 is 4455340453521.

1253540435544 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 54 + 0 + 43 + 554 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1253540435544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253540435549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24875814 + ... + 24926154.

Almost surely, 2^{1253540435544} is an apocalyptic number.

It is an amenable number.

1253540435544 is an abundant number, since it is smaller than the sum of its proper divisors (2155364067096).

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

1253540435544 is a wasteful number, since it uses less digits than its factorization.

1253540435544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51761 (or 51754 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 45.

The spelling of 1253540435544 in words is "one trillion, two hundred fifty-three billion, five hundred forty million, four hundred thirty-five thousand, five hundred forty-four".