551568428867 has 4 divisors (see below), whose sum is σ = 553517434200. Its totient is φ = 549619423536.

The previous prime is 551568428839. The next prime is 551568428953. The reversal of 551568428867 is 768824865155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768824865155 = 5 ⋅153764973031.

It is a cyclic number.

It is not a de Polignac number, because 551568428867 - 2³⁸ = 276690521923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551568424867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974502242 + ... + 974502807.

It is an arithmetic number, because the mean of its divisors is an integer number (138379358550).

Almost surely, 2^551568428867 is an apocalyptic number.

551568428867 is a deficient number, since it is larger than the sum of its proper divisors (1949005333).

551568428867 is a wasteful number, since it uses less digits than its factorization.

551568428867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949005332.

The product of its digits is 129024000, while the sum is 65.

The spelling of 551568428867 in words is "five hundred fifty-one billion, five hundred sixty-eight million, four hundred twenty-eight thousand, eight hundred sixty-seven".