1545140040253 has 4 divisors (see below), whose sum is σ = 1550718163420. Its totient is φ = 1539561917088.

The previous prime is 1545140040221. The next prime is 1545140040281. The reversal of 1545140040253 is 3520400415451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234854605924 + 1310285434329 = 484618^2 + 1144677^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545140040253 - 2⁵ = 1545140040221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545140040203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789061168 + ... + 2789061721.

It is an arithmetic number, because the mean of its divisors is an integer number (387679540855).

Almost surely, 2^{1545140040253} is an apocalyptic number.

It is an amenable number.

1545140040253 is a deficient number, since it is larger than the sum of its proper divisors (5578123167).

1545140040253 is an equidigital number, since it uses as much as digits as its factorization.

1545140040253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578123166.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 1545140040253 in words is "one trillion, five hundred forty-five billion, one hundred forty million, forty thousand, two hundred fifty-three".