42718773898 has 4 divisors (see below), whose sum is σ = 64078160850. Its totient is φ = 21359386948.

The previous prime is 42718773883. The next prime is 42718773961. The reversal of 42718773898 is 89837781724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 23162709249 + 19556064649 = 152193^2 + 139843^2 .

It is a super-2 number, since 2×42718773898² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10679693473 + ... + 10679693476.

Almost surely, 2^42718773898 is an apocalyptic number.

42718773898 is a deficient number, since it is larger than the sum of its proper divisors (21359386952).

42718773898 is a wasteful number, since it uses less digits than its factorization.

42718773898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21359386951.

The product of its digits is 37933056, while the sum is 64.

The spelling of 42718773898 in words is "forty-two billion, seven hundred eighteen million, seven hundred seventy-three thousand, eight hundred ninety-eight".