42779201823 has 12 divisors (see below), whose sum is σ = 61808168968. Its totient is φ = 28512088560.

The previous prime is 42779201819. The next prime is 42779201827. The reversal of 42779201823 is 32810297724.

It is an interprime number because it is at equal distance from previous prime (42779201819) and next prime (42779201827).

It is not a de Polignac number, because 42779201823 - 2² = 42779201819 is a prime.

It is a super-2 number, since 2×42779201823² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42779201827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 578113 + ... + 647898.

Almost surely, 2^42779201823 is an apocalyptic number.

42779201823 is a deficient number, since it is larger than the sum of its proper divisors (19028967145).

42779201823 is a wasteful number, since it uses less digits than its factorization.

42779201823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229894 (or 1229891 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 42779201823 in words is "forty-two billion, seven hundred seventy-nine million, two hundred one thousand, eight hundred twenty-three".