42718781642 has 32 divisors (see below), whose sum is σ = 66180853200. Its totient is φ = 20665248768.

The previous prime is 42718781641. The next prime is 42718781647. The reversal of 42718781642 is 24618781724.

42718781642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 32540191321 + 10178590321 = 180389^2 + 100889^2 .

It is not an unprimeable number, because it can be changed into a prime (42718781641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25231748 + ... + 25233440.

Almost surely, 2^42718781642 is an apocalyptic number.

42718781642 is a deficient number, since it is larger than the sum of its proper divisors (23462071558).

42718781642 is a wasteful number, since it uses less digits than its factorization.

42718781642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450.

The product of its digits is 1204224, while the sum is 50.

The spelling of 42718781642 in words is "forty-two billion, seven hundred eighteen million, seven hundred eighty-one thousand, six hundred forty-two".