79878090730 has 8 divisors (see below), whose sum is σ = 143780563332. Its totient is φ = 31951236288.

The previous prime is 79878090727. The next prime is 79878090749. The reversal of 79878090730 is 3709087897.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 74380016529 + 5498074201 = 272727^2 + 74149^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×79878090730² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3993904527 + ... + 3993904546.

Almost surely, 2^79878090730 is an apocalyptic number.

79878090730 is a deficient number, since it is larger than the sum of its proper divisors (63902472602).

79878090730 is a wasteful number, since it uses less digits than its factorization.

79878090730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987809080.

The product of its (nonzero) digits is 5334336, while the sum is 58.

The spelling of 79878090730 in words is "seventy-nine billion, eight hundred seventy-eight million, ninety thousand, seven hundred thirty".