129497780164 has 27 divisors (see below), whose sum is σ = 236932889263. Its totient is φ = 61925804072.

The previous prime is 129497780149. The next prime is 129497780173. The reversal of 129497780164 is 461087794921.

The square root of 129497780164 is 359858.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129497780099 and 129497780108.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16549557 + ... + 16557379.

Almost surely, 2^129497780164 is an apocalyptic number.

129497780164 is the 359858-th square number.

It is an amenable number.

129497780164 is a deficient number, since it is larger than the sum of its proper divisors (107435109099).

129497780164 is an frugal number, since it uses more digits than its factorization.

129497780164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15696 (or 7848 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 129497780164 in words is "one hundred twenty-nine billion, four hundred ninety-seven million, seven hundred eighty thousand, one hundred sixty-four".