79221378730 has 16 divisors (see below), whose sum is σ = 153567595944. Its totient is φ = 29250970560.

The previous prime is 79221378721. The next prime is 79221378737. The reversal of 79221378730 is 3787312297.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51376115569 + 27845263161 = 226663^2 + 166869^2 .

It is not an unprimeable number, because it can be changed into a prime (79221378737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304697481 + ... + 304697740.

Almost surely, 2^79221378730 is an apocalyptic number.

79221378730 is a deficient number, since it is larger than the sum of its proper divisors (74346217214).

79221378730 is a wasteful number, since it uses less digits than its factorization.

79221378730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609395241.

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 79221378730 in words is "seventy-nine billion, two hundred twenty-one million, three hundred seventy-eight thousand, seven hundred thirty".