45227621891 has 4 divisors (see below), whose sum is σ = 45228221472. Its totient is φ = 45227022312.

The previous prime is 45227621863. The next prime is 45227621893. The reversal of 45227621891 is 19812672254.

45227621891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45227621891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45227621893) 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, 167051 + ... + 344036.

It is an arithmetic number, because the mean of its divisors is an integer number (11307055368).

Almost surely, 2^45227621891 is an apocalyptic number.

45227621891 is a deficient number, since it is larger than the sum of its proper divisors (599581).

45227621891 is an equidigital number, since it uses as much as digits as its factorization.

45227621891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599580.

The product of its digits is 483840, while the sum is 47.

The spelling of 45227621891 in words is "forty-five billion, two hundred twenty-seven million, six hundred twenty-one thousand, eight hundred ninety-one".