551519016639 has 4 divisors (see below), whose sum is σ = 735358688856. Its totient is φ = 367679344424.

The previous prime is 551519016619. The next prime is 551519016641. The reversal of 551519016639 is 936610915155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551519016639 - 2⁸ = 551519016383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551519016591 and 551519016600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551519016619) 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, 91919836104 + ... + 91919836109.

It is an arithmetic number, because the mean of its divisors is an integer number (183839672214).

Almost surely, 2^551519016639 is an apocalyptic number.

551519016639 is a deficient number, since it is larger than the sum of its proper divisors (183839672217).

551519016639 is a wasteful number, since it uses less digits than its factorization.

551519016639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183839672216.

The product of its (nonzero) digits is 1093500, while the sum is 51.

The spelling of 551519016639 in words is "five hundred fifty-one billion, five hundred nineteen million, sixteen thousand, six hundred thirty-nine".