42155664923 has 8 divisors (see below), whose sum is σ = 42257274048. Its totient is φ = 42054159744.

The previous prime is 42155664919. The next prime is 42155665037. The reversal of 42155664923 is 32946655124.

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 42155664923 - 2² = 42155664919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42155664823) 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, 818861 + ... + 868817.

It is an arithmetic number, because the mean of its divisors is an integer number (5282159256).

Almost surely, 2^42155664923 is an apocalyptic number.

42155664923 is a deficient number, since it is larger than the sum of its proper divisors (101609125).

42155664923 is a wasteful number, since it uses less digits than its factorization.

42155664923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51973.

The product of its digits is 1555200, while the sum is 47.

The spelling of 42155664923 in words is "forty-two billion, one hundred fifty-five million, six hundred sixty-four thousand, nine hundred twenty-three".