26197989516513 has 32 divisors (see below), whose sum is σ = 38870834661120. Its totient is φ = 17438793989760.

The previous prime is 26197989516509. The next prime is 26197989516541. The reversal of 26197989516513 is 31561598979162.

26197989516513 is a `hidden beast` number, since 2 + 6 + 1 + 9 + 7 + 9 + 8 + 95 + 16 + 513 = 666.

It is not a de Polignac number, because 26197989516513 - 2² = 26197989516509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26197989515513) 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, 55955956 + ... + 56422202.

It is an arithmetic number, because the mean of its divisors is an integer number (1214713583160).

Almost surely, 2^{26197989516513} is an apocalyptic number.

It is an amenable number.

26197989516513 is a deficient number, since it is larger than the sum of its proper divisors (12672845144607).

26197989516513 is a wasteful number, since it uses less digits than its factorization.

26197989516513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469414 (or 469408 counting only the distinct ones).

The product of its digits is 220449600, while the sum is 72.

The spelling of 26197989516513 in words is "twenty-six trillion, one hundred ninety-seven billion, nine hundred eighty-nine million, five hundred sixteen thousand, five hundred thirteen".