79883640938 has 8 divisors (see below), whose sum is σ = 121011852420. Its totient is φ = 39546356800.

The previous prime is 79883640931. The next prime is 79883640953. The reversal of 79883640938 is 83904638897.

It can be written as a sum of positive squares in 2 ways, for example, as 67437337969 + 12446302969 = 259687^2 + 111563^2 .

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

It is a super-2 number, since 2×79883640938² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79883640931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197731583 + ... + 197731986.

Almost surely, 2^79883640938 is an apocalyptic number.

79883640938 is a deficient number, since it is larger than the sum of its proper divisors (41128211482).

79883640938 is a wasteful number, since it uses less digits than its factorization.

79883640938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395463672.

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 79883640938 in words is "seventy-nine billion, eight hundred eighty-three million, six hundred forty thousand, nine hundred thirty-eight".