1451491818 has 48 divisors (see below), whose sum is σ = 3493406880. Its totient is φ = 400409184.

The previous prime is 1451491813. The next prime is 1451491831. The reversal of 1451491818 is 8181941541.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1451491818.

It is not an unprimeable number, because it can be changed into a prime (1451491813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76596 + ... + 93647.

It is an arithmetic number, because the mean of its divisors is an integer number (72779310).

Almost surely, 2^1451491818 is an apocalyptic number.

1451491818 is an abundant number, since it is smaller than the sum of its proper divisors (2041915062).

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

1451491818 is a wasteful number, since it uses less digits than its factorization.

1451491818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170291 (or 170284 counting only the distinct ones).

The product of its digits is 46080, while the sum is 42.

The square root of 1451491818 is about 38098.4490235495. The cubic root of 1451491818 is about 1132.2392275141.

The spelling of 1451491818 in words is "one billion, four hundred fifty-one million, four hundred ninety-one thousand, eight hundred eighteen".