42786818397 has 6 divisors (see below), whose sum is σ = 61803182142. Its totient is φ = 28524545592.

The previous prime is 42786818383. The next prime is 42786818401. The reversal of 42786818397 is 79381868724.

It can be written as a sum of positive squares in only one way, i.e., 40961307321 + 1825511076 = 202389^2 + 42726^2 .

It is not a de Polignac number, because 42786818397 - 2⁸ = 42786818141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42786818197) 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 5 ways as a sum of consecutive naturals, for example, 2377045458 + ... + 2377045475.

It is an arithmetic number, because the mean of its divisors is an integer number (10300530357).

Almost surely, 2^42786818397 is an apocalyptic number.

It is an amenable number.

42786818397 is a deficient number, since it is larger than the sum of its proper divisors (19016363745).

42786818397 is a wasteful number, since it uses less digits than its factorization.

42786818397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754090939 (or 4754090936 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 42786818397 in words is "forty-two billion, seven hundred eighty-six million, eight hundred eighteen thousand, three hundred ninety-seven".