64291742129 has 8 divisors (see below), whose sum is σ = 65667276288. Its totient is φ = 62916525760.

The previous prime is 64291742117. The next prime is 64291742201. The reversal of 64291742129 is 92124719246.

It is a happy number.

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 64291742129 - 2²⁰ = 64290693553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64291742729) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 354584 + ... + 504294.

It is an arithmetic number, because the mean of its divisors is an integer number (8208409536).

Almost surely, 2^64291742129 is an apocalyptic number.

It is an amenable number.

64291742129 is a deficient number, since it is larger than the sum of its proper divisors (1375534159).

64291742129 is a wasteful number, since it uses less digits than its factorization.

64291742129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158895.

The product of its digits is 435456, while the sum is 47.

The spelling of 64291742129 in words is "sixty-four billion, two hundred ninety-one million, seven hundred forty-two thousand, one hundred twenty-nine".