129218040693 has 40 divisors (see below), whose sum is σ = 220909200512. Its totient is φ = 73737078624.

The previous prime is 129218040583. The next prime is 129218040713. The reversal of 129218040693 is 396040812921.

129218040693 is a `hidden beast` number, since 1 + 29 + 218 + 0 + 406 + 9 + 3 = 666.

It is not a de Polignac number, because 129218040693 - 2⁸ = 129218040437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129218040493) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 255471 + ... + 568947.

Almost surely, 2^129218040693 is an apocalyptic number.

It is an amenable number.

129218040693 is a deficient number, since it is larger than the sum of its proper divisors (91691159819).

129218040693 is an equidigital number, since it uses as much as digits as its factorization.

129218040693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314223 (or 314214 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 129218040693 in words is "one hundred twenty-nine billion, two hundred eighteen million, forty thousand, six hundred ninety-three".