451155478 has 4 divisors (see below), whose sum is σ = 676733220. Its totient is φ = 225577738.

The previous prime is 451155473. The next prime is 451155479. The reversal of 451155478 is 874551154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874551154 = 2 ⋅437275577.

It is a self number, because there is not a number n which added to its sum of digits gives 451155478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451155473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112788868 + ... + 112788871.

It is an arithmetic number, because the mean of its divisors is an integer number (169183305).

Almost surely, 2^451155478 is an apocalyptic number.

451155478 is a deficient number, since it is larger than the sum of its proper divisors (225577742).

451155478 is a wasteful number, since it uses less digits than its factorization.

451155478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225577741.

The product of its digits is 112000, while the sum is 40.

The square root of 451155478 is about 21240.4208527044. The cubic root of 451155478 is about 766.9647634315.

The spelling of 451155478 in words is "four hundred fifty-one million, one hundred fifty-five thousand, four hundred seventy-eight".