551391396853 has 6 divisors (see below), whose sum is σ = 606074841302. Its totient is φ = 501264906120.

The previous prime is 551391396851. The next prime is 551391396883. The reversal of 551391396853 is 358693193155.

It can be written as a sum of positive squares in only one way, i.e., 438698249649 + 112693147204 = 662343^2 + 335698^2 .

It is not a de Polignac number, because 551391396853 - 2¹ = 551391396851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551391396851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2278476726 + ... + 2278476967.

Almost surely, 2^551391396853 is an apocalyptic number.

It is an amenable number.

551391396853 is a deficient number, since it is larger than the sum of its proper divisors (54683444449).

551391396853 is a wasteful number, since it uses less digits than its factorization.

551391396853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556953715 (or 4556953704 counting only the distinct ones).

The product of its digits is 13122000, while the sum is 58.

The spelling of 551391396853 in words is "five hundred fifty-one billion, three hundred ninety-one million, three hundred ninety-six thousand, eight hundred fifty-three".