42686343855 has 24 divisors (see below), whose sum is σ = 74066252832. Its totient is φ = 22742483904.

The previous prime is 42686343829. The next prime is 42686343913. The reversal of 42686343855 is 55834368624.

42686343855 is a `hidden beast` number, since 42 + 68 + 63 + 438 + 55 = 666.

It is not a de Polignac number, because 42686343855 - 2⁷ = 42686343727 is a prime.

It is a super-3 number, since 3×42686343855³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 446964 + ... + 533993.

It is an arithmetic number, because the mean of its divisors is an integer number (3086093868).

Almost surely, 2^42686343855 is an apocalyptic number.

42686343855 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42686343855 is a deficient number, since it is larger than the sum of its proper divisors (31379908977).

42686343855 is a wasteful number, since it uses less digits than its factorization.

42686343855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981935 (or 981932 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

It can be divided in two parts, 4268634 and 3855, that added together give a square (4272489 = 2067²).

The spelling of 42686343855 in words is "forty-two billion, six hundred eighty-six million, three hundred forty-three thousand, eight hundred fifty-five".