42012508278 has 64 divisors (see below), whose sum is σ = 93710453760. Its totient is φ = 12467613312.

The previous prime is 42012508229. The next prime is 42012508339. The reversal of 42012508278 is 87280521024.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2177751 + ... + 2196957.

It is an arithmetic number, because the mean of its divisors is an integer number (1464225840).

Almost surely, 2^42012508278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42012508278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46855226880).

42012508278 is an abundant number, since it is smaller than the sum of its proper divisors (51697945482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42012508278 is a wasteful number, since it uses less digits than its factorization.

42012508278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221.

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 42012508278 in words is "forty-two billion, twelve million, five hundred eight thousand, two hundred seventy-eight".