742686421079 has 4 divisors (see below), whose sum is σ = 748107489984. Its totient is φ = 737265352176.

The previous prime is 742686421049. The next prime is 742686421093. The reversal of 742686421079 is 970124686247.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742686421079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742686421049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710534247 + ... + 2710534520.

It is an arithmetic number, because the mean of its divisors is an integer number (187026872496).

Almost surely, 2^742686421079 is an apocalyptic number.

742686421079 is a deficient number, since it is larger than the sum of its proper divisors (5421068905).

742686421079 is a wasteful number, since it uses less digits than its factorization.

742686421079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421068904.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 742686421079 in words is "seven hundred forty-two billion, six hundred eighty-six million, four hundred twenty-one thousand, seventy-nine".