742686421078 has 64 divisors (see below), whose sum is σ = 1372843468800. Its totient is φ = 294079933440.

The previous prime is 742686421049. The next prime is 742686421093. The reversal of 742686421078 is 870124686247.

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, 10059418 + ... + 10132978.

It is an arithmetic number, because the mean of its divisors is an integer number (21450679200).

Almost surely, 2^742686421078 is an apocalyptic number.

742686421078 is a deficient number, since it is larger than the sum of its proper divisors (630157047722).

742686421078 is a wasteful number, since it uses less digits than its factorization.

742686421078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74365.

The product of its (nonzero) digits is 7225344, while the sum is 55.

The spelling of 742686421078 in words is "seven hundred forty-two billion, six hundred eighty-six million, four hundred twenty-one thousand, seventy-eight".