9550561660651 has 4 divisors (see below), whose sum is σ = 10418794538904. Its totient is φ = 8682328782400.

The previous prime is 9550561660573. The next prime is 9550561660663. The reversal of 9550561660651 is 1560661650559.

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 9550561660651 - 2¹⁵ = 9550561627883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9550561660592 and 9550561660601.

It is not an unprimeable number, because it can be changed into a prime (9550561660951) 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, 434116439110 + ... + 434116439131.

It is an arithmetic number, because the mean of its divisors is an integer number (2604698634726).

Almost surely, 2^{9550561660651} is an apocalyptic number.

9550561660651 is a deficient number, since it is larger than the sum of its proper divisors (868232878253).

9550561660651 is a wasteful number, since it uses less digits than its factorization.

9550561660651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868232878252.

The product of its (nonzero) digits is 7290000, while the sum is 55.

The spelling of 9550561660651 in words is "nine trillion, five hundred fifty billion, five hundred sixty-one million, six hundred sixty thousand, six hundred fifty-one".