2129653693438 has 16 divisors (see below), whose sum is σ = 3199943738880. Its totient is φ = 1063006001496.

The previous prime is 2129653693429. The next prime is 2129653693439. The reversal of 2129653693438 is 8343963569212.

It is a super-2 number, since 2×2129653693438² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129653693439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23480845 + ... + 23571367.

It is an arithmetic number, because the mean of its divisors is an integer number (199996483680).

Almost surely, 2^{2129653693438} is an apocalyptic number.

2129653693438 is a deficient number, since it is larger than the sum of its proper divisors (1070290045442).

2129653693438 is a wasteful number, since it uses less digits than its factorization.

2129653693438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110511.

The product of its digits is 50388480, while the sum is 61.

The spelling of 2129653693438 in words is "two trillion, one hundred twenty-nine billion, six hundred fifty-three million, six hundred ninety-three thousand, four hundred thirty-eight".