45294981991 has 4 divisors (see below), whose sum is σ = 51765693712. Its totient is φ = 38824270272.

The previous prime is 45294981983. The next prime is 45294981997. The reversal of 45294981991 is 19918949254.

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 45294981991 - 2³ = 45294981983 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 (45294981997) 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, 3235355850 + ... + 3235355863.

It is an arithmetic number, because the mean of its divisors is an integer number (12941423428).

Almost surely, 2^45294981991 is an apocalyptic number.

45294981991 is a deficient number, since it is larger than the sum of its proper divisors (6470711721).

45294981991 is an equidigital number, since it uses as much as digits as its factorization.

45294981991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6470711720.

The product of its digits is 8398080, while the sum is 61.

The spelling of 45294981991 in words is "forty-five billion, two hundred ninety-four million, nine hundred eighty-one thousand, nine hundred ninety-one".