129274601986 has 4 divisors (see below), whose sum is σ = 193911902982. Its totient is φ = 64637300992.

The previous prime is 129274601977. The next prime is 129274602047. The reversal of 129274601986 is 689106472921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 73357014025 + 55917587961 = 270845^2 + 236469^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32318650495 + ... + 32318650498.

Almost surely, 2^129274601986 is an apocalyptic number.

129274601986 is a deficient number, since it is larger than the sum of its proper divisors (64637300996).

129274601986 is an equidigital number, since it uses as much as digits as its factorization.

129274601986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64637300995.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 129274601986 in words is "one hundred twenty-nine billion, two hundred seventy-four million, six hundred one thousand, nine hundred eighty-six".