45540891 has 72 divisors (see below), whose sum is σ = 79672320. Its totient is φ = 24948000.

The previous prime is 45540889. The next prime is 45540899. The reversal of 45540891 is 19804554.

It is not a de Polignac number, because 45540891 - 2¹ = 45540889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45540899) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 641386 + ... + 641456.

It is an arithmetic number, because the mean of its divisors is an integer number (1106560).

Almost surely, 2^45540891 is an apocalyptic number.

45540891 is a deficient number, since it is larger than the sum of its proper divisors (34131429).

45540891 is a wasteful number, since it uses less digits than its factorization.

45540891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 45540891 is about 6748.3991435006. The cubic root of 45540891 is about 357.1087633207.

The spelling of 45540891 in words is "forty-five million, five hundred forty thousand, eight hundred ninety-one".