551317662465 has 16 divisors (see below), whose sum is σ = 882118080000. Its totient is φ = 294032813312.

The previous prime is 551317662451. The next prime is 551317662503. The reversal of 551317662465 is 564266713155.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 551317662465 - 2⁴ = 551317662449 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1859536 + ... + 2135534.

It is an arithmetic number, because the mean of its divisors is an integer number (55132380000).

Almost surely, 2^551317662465 is an apocalyptic number.

It is an amenable number.

551317662465 is a deficient number, since it is larger than the sum of its proper divisors (330800417535).

551317662465 is a wasteful number, since it uses less digits than its factorization.

551317662465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409176.

The product of its digits is 4536000, while the sum is 51.

The spelling of 551317662465 in words is "five hundred fifty-one billion, three hundred seventeen million, six hundred sixty-two thousand, four hundred sixty-five".