45478191 has 16 divisors (see below), whose sum is σ = 69632640. Its totient is φ = 26111520.

The previous prime is 45478189. The next prime is 45478201. The reversal of 45478191 is 19187454.

It is not a de Polignac number, because 45478191 - 2¹ = 45478189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45478591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35640 + ... + 36893.

It is an arithmetic number, because the mean of its divisors is an integer number (4352040).

Almost surely, 2^45478191 is an apocalyptic number.

45478191 is a deficient number, since it is larger than the sum of its proper divisors (24154449).

45478191 is a wasteful number, since it uses less digits than its factorization.

45478191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72566.

The product of its digits is 40320, while the sum is 39.

The square root of 45478191 is about 6743.7519972194. The cubic root of 45478191 is about 356.9448007618.

The spelling of 45478191 in words is "forty-five million, four hundred seventy-eight thousand, one hundred ninety-one".