45151821791 has 4 divisors (see below), whose sum is σ = 45159544584. Its totient is φ = 45144099000.

The previous prime is 45151821763. The next prime is 45151821821. The reversal of 45151821791 is 19712815154.

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

It is a cyclic number.

It is not a de Polignac number, because 45151821791 - 2¹⁴ = 45151805407 is a prime.

It is a super-2 number, since 2×45151821791² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45151821691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3852620 + ... + 3864321.

It is an arithmetic number, because the mean of its divisors is an integer number (11289886146).

Almost surely, 2^45151821791 is an apocalyptic number.

45151821791 is a deficient number, since it is larger than the sum of its proper divisors (7722793).

45151821791 is an equidigital number, since it uses as much as digits as its factorization.

45151821791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7722792.

The product of its digits is 100800, while the sum is 44.

The spelling of 45151821791 in words is "forty-five billion, one hundred fifty-one million, eight hundred twenty-one thousand, seven hundred ninety-one".