9550405279129 has 27 divisors (see below), whose sum is σ = 11367698692287. Its totient is φ = 8013955263600.

The previous prime is 9550405279117. The next prime is 9550405279157. The reversal of 9550405279129 is 9219725040559.

It is a happy number.

The square root of 9550405279129 is 3090373.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1412781846025 + 8137623433104 = 1188605^2 + 2852652^2 .

It is not a de Polignac number, because 9550405279129 - 2⁷ = 9550405279001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9550405279529) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 441912534 + ... + 441934144.

Almost surely, 2^{9550405279129} is an apocalyptic number.

9550405279129 is the 3090373-rd square number.

9550405279129 is the 1545187-th centered octagonal number.

It is an amenable number.

9550405279129 is a deficient number, since it is larger than the sum of its proper divisors (1817293413158).

9550405279129 is an frugal number, since it uses more digits than its factorization.

9550405279129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43270 (or 21635 counting only the distinct ones).

The product of its (nonzero) digits is 10206000, while the sum is 58.

The spelling of 9550405279129 in words is "nine trillion, five hundred fifty billion, four hundred five million, two hundred seventy-nine thousand, one hundred twenty-nine".