551455645 has 8 divisors (see below), whose sum is σ = 712650456. Its totient is φ = 407228736.

The previous prime is 551455643. The next prime is 551455661. The reversal of 551455645 is 546554155.

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 551451289 = 66^2 + 23483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551455645 - 2¹ = 551455643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551455598 and 551455607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551455643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4241902 + ... + 4242031.

It is an arithmetic number, because the mean of its divisors is an integer number (89081307).

Almost surely, 2^551455645 is an apocalyptic number.

It is an amenable number.

551455645 is a deficient number, since it is larger than the sum of its proper divisors (161194811).

551455645 is a wasteful number, since it uses less digits than its factorization.

551455645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8483951.

The product of its digits is 300000, while the sum is 40.

The square root of 551455645 is about 23483.0927477622. The cubic root of 551455645 is about 820.0434465380.

The spelling of 551455645 in words is "five hundred fifty-one million, four hundred fifty-five thousand, six hundred forty-five".