9691687628955 has 288 divisors, whose sum is σ = 18728362598400. Its totient is φ = 4800895557120.

The previous prime is 9691687628933. The next prime is 9691687628999. The reversal of 9691687628955 is 5598267861969.

9691687628955 is a `hidden beast` number, since 9 + 69 + 168 + 76 + 289 + 55 = 666.

It is not a de Polignac number, because 9691687628955 - 2⁹ = 9691687628443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 4972645321 + ... + 4972647269.

It is an arithmetic number, because the mean of its divisors is an integer number (65029036800).

Almost surely, 2^{9691687628955} is an apocalyptic number.

9691687628955 is a deficient number, since it is larger than the sum of its proper divisors (9036674969445).

9691687628955 is a wasteful number, since it uses less digits than its factorization.

9691687628955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153 (or 2088 counting only the distinct ones).

The product of its digits is 3527193600, while the sum is 81.

The spelling of 9691687628955 in words is "nine trillion, six hundred ninety-one billion, six hundred eighty-seven million, six hundred twenty-eight thousand, nine hundred fifty-five".