7635145173121 has 4 divisors (see below), whose sum is σ = 7635656618500. Its totient is φ = 7634633727744.

The previous prime is 7635145173049. The next prime is 7635145173151. The reversal of 7635145173121 is 1213715415367.

It is a happy number.

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 3174326608896 + 4460818564225 = 1781664^2 + 2112065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7635145173121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7635145173151) 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, 255700296 + ... + 255730153.

It is an arithmetic number, because the mean of its divisors is an integer number (1908914154625).

Almost surely, 2^{7635145173121} is an apocalyptic number.

It is an amenable number.

7635145173121 is a deficient number, since it is larger than the sum of its proper divisors (511445379).

7635145173121 is a wasteful number, since it uses less digits than its factorization.

7635145173121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511445378.

The product of its digits is 529200, while the sum is 46.

The spelling of 7635145173121 in words is "seven trillion, six hundred thirty-five billion, one hundred forty-five million, one hundred seventy-three thousand, one hundred twenty-one".