551874645 has 96 divisors (see below), whose sum is σ = 1126993920. Its totient is φ = 244632960.

The previous prime is 551874643. The next prime is 551874677. The reversal of 551874645 is 546478155.

551874645 is a `hidden beast` number, since 5 + 5 + 187 + 464 + 5 = 666.

It is not a de Polignac number, because 551874645 - 2¹ = 551874643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 551874645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551874643) 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 in 95 ways as a sum of consecutive naturals, for example, 1667130 + ... + 1667460.

It is an arithmetic number, because the mean of its divisors is an integer number (11739520).

Almost surely, 2^551874645 is an apocalyptic number.

It is an amenable number.

551874645 is an abundant number, since it is smaller than the sum of its proper divisors (575119275).

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

551874645 is a wasteful number, since it uses less digits than its factorization.

551874645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 492 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 551874645 is about 23492.0123659085. The cubic root of 551874645 is about 820.2510856117.

The spelling of 551874645 in words is "five hundred fifty-one million, eight hundred seventy-four thousand, six hundred forty-five".