551656486 has 4 divisors (see below), whose sum is σ = 827484732. Its totient is φ = 275828242.

The previous prime is 551656463. The next prime is 551656487. The reversal of 551656486 is 684656155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 684656155 = 5 ⋅136931231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551656487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137914120 + ... + 137914123.

It is an arithmetic number, because the mean of its divisors is an integer number (206871183).

Almost surely, 2^551656486 is an apocalyptic number.

551656486 is a deficient number, since it is larger than the sum of its proper divisors (275828246).

551656486 is a wasteful number, since it uses less digits than its factorization.

551656486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275828245.

The product of its digits is 864000, while the sum is 46.

The square root of 551656486 is about 23487.3686478498. The cubic root of 551656486 is about 820.1429881523.

The spelling of 551656486 in words is "five hundred fifty-one million, six hundred fifty-six thousand, four hundred eighty-six".