423375878857 has 4 divisors (see below), whose sum is σ = 423477241876. Its totient is φ = 423274515840.

The previous prime is 423375878851. The next prime is 423375878879. The reversal of 423375878857 is 758878573324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 400017035961 + 23358842896 = 632469^2 + 152836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423375878857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423375878792 and 423375878801.

It is not an unprimeable number, because it can be changed into a prime (423375878851) 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, 50675244 + ... + 50683597.

It is an arithmetic number, because the mean of its divisors is an integer number (105869310469).

Almost surely, 2^423375878857 is an apocalyptic number.

It is an amenable number.

423375878857 is a deficient number, since it is larger than the sum of its proper divisors (101363019).

423375878857 is a wasteful number, since it uses less digits than its factorization.

423375878857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101363018.

The product of its digits is 316108800, while the sum is 67.

The spelling of 423375878857 in words is "four hundred twenty-three billion, three hundred seventy-five million, eight hundred seventy-eight thousand, eight hundred fifty-seven".