79308421844 has 6 divisors (see below), whose sum is σ = 138789738234. Its totient is φ = 39654210920.

The previous prime is 79308421793. The next prime is 79308421861. The reversal of 79308421844 is 44812480397.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 44558988100 + 34749433744 = 211090^2 + 186412^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79308421792 and 79308421801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9913552727 + ... + 9913552734.

It is an arithmetic number, because the mean of its divisors is an integer number (23131623039).

Almost surely, 2^79308421844 is an apocalyptic number.

It is an amenable number.

79308421844 is a deficient number, since it is larger than the sum of its proper divisors (59481316390).

79308421844 is a wasteful number, since it uses less digits than its factorization.

79308421844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19827105465 (or 19827105463 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 79308421844 in words is "seventy-nine billion, three hundred eight million, four hundred twenty-one thousand, eight hundred forty-four".