42878785387615 has 8 divisors (see below), whose sum is σ = 51505037606160. Its totient is φ = 34269364882752.

The previous prime is 42878785387589. The next prime is 42878785387649. The reversal of 42878785387615 is 51678358787824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42878785387615 - 2²¹ = 42878783290463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4207922814 + ... + 4207933003.

It is an arithmetic number, because the mean of its divisors is an integer number (6438129700770).

Almost surely, 2^{42878785387615} is an apocalyptic number.

42878785387615 is a deficient number, since it is larger than the sum of its proper divisors (8626252218545).

42878785387615 is a wasteful number, since it uses less digits than its factorization.

42878785387615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8415856841.

The product of its digits is 5057740800, while the sum is 79.

The spelling of 42878785387615 in words is "forty-two trillion, eight hundred seventy-eight billion, seven hundred eighty-five million, three hundred eighty-seven thousand, six hundred fifteen".