799879978997 has 32 divisors (see below), whose sum is σ = 927763200000. Its totient is φ = 681989552640.

The previous prime is 799879978907. The next prime is 799879978999.

799879978997 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 799879978997 - 2⁸ = 799879978741 is a prime.

It is a super-2 number, since 2×799879978997² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (799879978999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10216004 + ... + 10294002.

It is an arithmetic number, because the mean of its divisors is an integer number (28992600000).

Almost surely, 2^799879978997 is an apocalyptic number.

It is an amenable number.

799879978997 is a deficient number, since it is larger than the sum of its proper divisors (127883221003).

799879978997 is a wasteful number, since it uses less digits than its factorization.

799879978997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78521.

The product of its digits is 81663349824, while the sum is 98.

The spelling of 799879978997 in words is "seven hundred ninety-nine billion, eight hundred seventy-nine million, nine hundred seventy-eight thousand, nine hundred ninety-seven".