551455513551 has 24 divisors (see below), whose sum is σ = 815306731200. Its totient is φ = 359013451776.

The previous prime is 551455513529. The next prime is 551455513573. The reversal of 551455513551 is 155315554155.

It is a happy number.

551455513551 is a `hidden beast` number, since 5 + 5 + 1 + 45 + 5 + 51 + 3 + 551 = 666.

It is an interprime number because it is at equal distance from previous prime (551455513529) and next prime (551455513573).

It is not a de Polignac number, because 551455513551 - 2¹⁸ = 551455251407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551455513497 and 551455513506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551455513451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1261830 + ... + 1641683.

It is an arithmetic number, because the mean of its divisors is an integer number (33971113800).

Almost surely, 2^551455513551 is an apocalyptic number.

551455513551 is a deficient number, since it is larger than the sum of its proper divisors (263851217649).

551455513551 is a wasteful number, since it uses less digits than its factorization.

551455513551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904015 (or 2904012 counting only the distinct ones).

The product of its digits is 937500, while the sum is 45.

The spelling of 551455513551 in words is "five hundred fifty-one billion, four hundred fifty-five million, five hundred thirteen thousand, five hundred fifty-one".