45261045135521 has 4 divisors (see below), whose sum is σ = 45898524644544. Its totient is φ = 44623565626500.

The previous prime is 45261045135437. The next prime is 45261045135613. The reversal of 45261045135521 is 12553154016254.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45261045135521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45261045135821) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 318739754405 + ... + 318739754546.

It is an arithmetic number, because the mean of its divisors is an integer number (11474631161136).

Almost surely, 2^{45261045135521} is an apocalyptic number.

It is an amenable number.

45261045135521 is a deficient number, since it is larger than the sum of its proper divisors (637479509023).

45261045135521 is an equidigital number, since it uses as much as digits as its factorization.

45261045135521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637479509022.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 45261045135521 in words is "forty-five trillion, two hundred sixty-one billion, forty-five million, one hundred thirty-five thousand, five hundred twenty-one".