42879312993 has 32 divisors (see below), whose sum is σ = 69514467840. Its totient is φ = 23171477760.

The previous prime is 42879312979. The next prime is 42879313021. The reversal of 42879312993 is 39921397824.

It is not a de Polignac number, because 42879312993 - 2⁵ = 42879312961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (42879312893) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2000755 + ... + 2022072.

It is an arithmetic number, because the mean of its divisors is an integer number (2172327120).

Almost surely, 2^42879312993 is an apocalyptic number.

It is an amenable number.

42879312993 is a deficient number, since it is larger than the sum of its proper divisors (26635154847).

42879312993 is a wasteful number, since it uses less digits than its factorization.

42879312993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022877.

The product of its digits is 5878656, while the sum is 57.

It can be divided in two parts, 4287931 and 2993, that added together give a palindrome (4290924).

The spelling of 42879312993 in words is "forty-two billion, eight hundred seventy-nine million, three hundred twelve thousand, nine hundred ninety-three".