42878307728731 has 16 divisors (see below), whose sum is σ = 43852895739360. Its totient is φ = 41909920648960.

The previous prime is 42878307728713. The next prime is 42878307728759. The reversal of 42878307728731 is 13782770387824.

It is a cyclic number.

It is not a de Polignac number, because 42878307728731 - 2⁵ = 42878307728699 is a prime.

It is a super-2 number, since 2×42878307728731² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42878307728131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64797900 + ... + 65456278.

It is an arithmetic number, because the mean of its divisors is an integer number (2740805983710).

Almost surely, 2^{42878307728731} is an apocalyptic number.

42878307728731 is a deficient number, since it is larger than the sum of its proper divisors (974588010629).

42878307728731 is a wasteful number, since it uses less digits than its factorization.

42878307728731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663086.

The product of its (nonzero) digits is 177020928, while the sum is 67.

The spelling of 42878307728731 in words is "forty-two trillion, eight hundred seventy-eight billion, three hundred seven million, seven hundred twenty-eight thousand, seven hundred thirty-one".