42861672929 has 4 divisors (see below), whose sum is σ = 42991164720. Its totient is φ = 42732181140.

The previous prime is 42861672881. The next prime is 42861672961. The reversal of 42861672929 is 92927616824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42861672929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42861672629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64745399 + ... + 64746060.

It is an arithmetic number, because the mean of its divisors is an integer number (10747791180).

Almost surely, 2^42861672929 is an apocalyptic number.

It is an amenable number.

42861672929 is a deficient number, since it is larger than the sum of its proper divisors (129491791).

42861672929 is a wasteful number, since it uses less digits than its factorization.

42861672929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129491790.

The product of its digits is 5225472, while the sum is 56.

The spelling of 42861672929 in words is "forty-two billion, eight hundred sixty-one million, six hundred seventy-two thousand, nine hundred twenty-nine".