129473763661 has 8 divisors (see below), whose sum is σ = 141695368704. Its totient is φ = 117327369120.

The previous prime is 129473763649. The next prime is 129473763667. The reversal of 129473763661 is 166367374921.

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 129473763661 - 2⁹ = 129473763149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129473763667) 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, 18799021 + ... + 18805906.

It is an arithmetic number, because the mean of its divisors is an integer number (17711921088).

Almost surely, 2^129473763661 is an apocalyptic number.

129473763661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129473763661 is a deficient number, since it is larger than the sum of its proper divisors (12221605043).

129473763661 is a wasteful number, since it uses less digits than its factorization.

129473763661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37605251.

The product of its digits is 6858432, while the sum is 55.

The spelling of 129473763661 in words is "one hundred twenty-nine billion, four hundred seventy-three million, seven hundred sixty-three thousand, six hundred sixty-one".