129780644932 has 24 divisors (see below), whose sum is σ = 230985911520. Its totient is φ = 63784864320.

The previous prime is 129780644891. The next prime is 129780644933. The reversal of 129780644932 is 239446087921.

It is not an unprimeable number, because it can be changed into a prime (129780644933) 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, 4261383 + ... + 4291729.

It is an arithmetic number, because the mean of its divisors is an integer number (9624412980).

Almost surely, 2^129780644932 is an apocalyptic number.

It is an amenable number.

129780644932 is a deficient number, since it is larger than the sum of its proper divisors (101205266588).

129780644932 is a wasteful number, since it uses less digits than its factorization.

129780644932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48531 (or 48529 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 129780644932 in words is "one hundred twenty-nine billion, seven hundred eighty million, six hundred forty-four thousand, nine hundred thirty-two".