9550459645551 has 16 divisors (see below), whose sum is σ = 15435086296320. Its totient is φ = 5788157360760.

The previous prime is 9550459645547. The next prime is 9550459645553. The reversal of 9550459645551 is 1555469540559.

9550459645551 is a `hidden beast` number, since 9 + 5 + 5 + 0 + 45 + 96 + 455 + 51 = 666.

It is not a de Polignac number, because 9550459645551 - 2² = 9550459645547 is a prime.

It is a super-2 number, since 2×9550459645551² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9550459645553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16078214595 + ... + 16078215188.

It is an arithmetic number, because the mean of its divisors is an integer number (964692893520).

Almost surely, 2^{9550459645551} is an apocalyptic number.

9550459645551 is a deficient number, since it is larger than the sum of its proper divisors (5884626650769).

9550459645551 is a wasteful number, since it uses less digits than its factorization.

9550459645551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32156429803 (or 32156429797 counting only the distinct ones).

The product of its (nonzero) digits is 121500000, while the sum is 63.

The spelling of 9550459645551 in words is "nine trillion, five hundred fifty billion, four hundred fifty-nine million, six hundred forty-five thousand, five hundred fifty-one".