42942777778 has 8 divisors (see below), whose sum is σ = 64482622380. Its totient is φ = 21448570320.

The previous prime is 42942777737. The next prime is 42942777791. The reversal of 42942777778 is 87777724924.

It can be written as a sum of positive squares in 2 ways, for example, as 36007719049 + 6935058729 = 189757^2 + 83277^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11406933 + ... + 11410696.

Almost surely, 2^42942777778 is an apocalyptic number.

42942777778 is a deficient number, since it is larger than the sum of its proper divisors (21539844602).

42942777778 is a wasteful number, since it uses less digits than its factorization.

42942777778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22818572.

The product of its digits is 77446656, while the sum is 64.

The spelling of 42942777778 in words is "forty-two billion, nine hundred forty-two million, seven hundred seventy-seven thousand, seven hundred seventy-eight".