9519117950421 has 12 divisors (see below), whose sum is σ = 13750094124780. Its totient is φ = 6345959978880.

The previous prime is 9519117950417. The next prime is 9519117950483. The reversal of 9519117950421 is 1240597119159.

9519117950421 is a `hidden beast` number, since 9 + 5 + 19 + 117 + 9 + 504 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9089555682321 + 429562268100 = 3014889^2 + 655410^2 .

It is not a de Polignac number, because 9519117950421 - 2² = 9519117950417 is a prime.

It is a super-2 number, since 2×9519117950421² (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 (9519117950521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9378420 + ... + 10343741.

It is an arithmetic number, because the mean of its divisors is an integer number (1145841177065).

Almost surely, 2^{9519117950421} is an apocalyptic number.

It is an amenable number.

9519117950421 is a deficient number, since it is larger than the sum of its proper divisors (4230976174359).

9519117950421 is a wasteful number, since it uses less digits than its factorization.

9519117950421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19775796 (or 19775793 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 54.

The spelling of 9519117950421 in words is "nine trillion, five hundred nineteen billion, one hundred seventeen million, nine hundred fifty thousand, four hundred twenty-one".