42878331437731 has 4 divisors (see below), whose sum is σ = 42879623726464. Its totient is φ = 42877039149000.

The previous prime is 42878331437713. The next prime is 42878331437863. The reversal of 42878331437731 is 13773413387824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42878331437731 - 2⁴⁵ = 7693959348899 is a prime.

It is a super-3 number, since 3×42878331437731³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42878331437731.

It is not an unprimeable number, because it can be changed into a prime (42878331431731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646094595 + ... + 646160956.

It is an arithmetic number, because the mean of its divisors is an integer number (10719905931616).

Almost surely, 2^{42878331437731} is an apocalyptic number.

42878331437731 is a deficient number, since it is larger than the sum of its proper divisors (1292288733).

42878331437731 is a wasteful number, since it uses less digits than its factorization.

42878331437731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292288732.

The product of its digits is 56899584, while the sum is 61.

The spelling of 42878331437731 in words is "forty-two trillion, eight hundred seventy-eight billion, three hundred thirty-one million, four hundred thirty-seven thousand, seven hundred thirty-one".