42743784778 has 8 divisors (see below), whose sum is σ = 64395658980. Its totient is φ = 21278565120.

The previous prime is 42743784761. The next prime is 42743784803. The reversal of 42743784778 is 87748734724.

It can be written as a sum of positive squares in 2 ways, for example, as 42653401729 + 90383049 = 206527^2 + 9507^2 .

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

It is a super-2 number, since 2×42743784778² (a number of 22 digits) contains 22 as substring.

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, 46663063 + ... + 46663978.

Almost surely, 2^42743784778 is an apocalyptic number.

42743784778 is a deficient number, since it is larger than the sum of its proper divisors (21651874202).

42743784778 is a wasteful number, since it uses less digits than its factorization.

42743784778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93327272.

The product of its digits is 59006976, while the sum is 61.

It can be divided in two parts, 427437 and 84778, that added together give a palindrome (512215).

The spelling of 42743784778 in words is "forty-two billion, seven hundred forty-three million, seven hundred eighty-four thousand, seven hundred seventy-eight".