45451812 has 72 divisors (see below), whose sum is σ = 130654944. Its totient is φ = 12219648.

The previous prime is 45451753. The next prime is 45451843. The reversal of 45451812 is 21815454.

It is a self number, because there is not a number n which added to its sum of digits gives 45451812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7723 + ... + 12269.

It is an arithmetic number, because the mean of its divisors is an integer number (1814652).

Almost surely, 2^45451812 is an apocalyptic number.

45451812 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45451812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65327472).

45451812 is an abundant number, since it is smaller than the sum of its proper divisors (85203132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45451812 is a wasteful number, since it uses less digits than its factorization.

45451812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4585 (or 4576 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 45451812 is about 6741.7959031700. The cubic root of 45451812 is about 356.8757737712.

The spelling of 45451812 in words is "forty-five million, four hundred fifty-one thousand, eight hundred twelve".