79408656890 has 8 divisors (see below), whose sum is σ = 142935582420. Its totient is φ = 31763462752.

The previous prime is 79408656857. The next prime is 79408656911. The reversal of 79408656890 is 9865680497.

It can be written as a sum of positive squares in 2 ways, for example, as 79058255929 + 350400961 = 281173^2 + 18719^2 .

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

It is a super-3 number, since 3×79408656890³ (a number of 34 digits) contains 333 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, 3970432835 + ... + 3970432854.

Almost surely, 2^79408656890 is an apocalyptic number.

79408656890 is a deficient number, since it is larger than the sum of its proper divisors (63526925530).

79408656890 is a wasteful number, since it uses less digits than its factorization.

79408656890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7940865696.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 79408656890 in words is "seventy-nine billion, four hundred eight million, six hundred fifty-six thousand, eight hundred ninety".