129437365669 has 8 divisors (see below), whose sum is σ = 130669422912. Its totient is φ = 128206827840.

The previous prime is 129437365667. The next prime is 129437365699. The reversal of 129437365669 is 966563734921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129437365669 - 2¹ = 129437365667 is a prime.

It is a super-2 number, since 2×129437365669² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129437365663) 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, 208299 + ... + 549784.

It is an arithmetic number, because the mean of its divisors is an integer number (16333677864).

Almost surely, 2^129437365669 is an apocalyptic number.

It is an amenable number.

129437365669 is a deficient number, since it is larger than the sum of its proper divisors (1232057243).

129437365669 is a wasteful number, since it uses less digits than its factorization.

129437365669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759707.

The product of its digits is 44089920, while the sum is 61.

The spelling of 129437365669 in words is "one hundred twenty-nine billion, four hundred thirty-seven million, three hundred sixty-five thousand, six hundred sixty-nine".