79940440603213 has 4 divisors (see below), whose sum is σ = 80027426937760. Its totient is φ = 79853454268668.

The previous prime is 79940440603211. The next prime is 79940440603241. The reversal of 79940440603213 is 31230604404997.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79940440603213 - 2¹ = 79940440603211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79940440603211) 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, 43493165895 + ... + 43493167732.

It is an arithmetic number, because the mean of its divisors is an integer number (20006856734440).

Almost surely, 2^{79940440603213} is an apocalyptic number.

It is an amenable number.

79940440603213 is a deficient number, since it is larger than the sum of its proper divisors (86986334547).

79940440603213 is an equidigital number, since it uses as much as digits as its factorization.

79940440603213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86986334546.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 79940440603213 in words is "seventy-nine trillion, nine hundred forty billion, four hundred forty million, six hundred three thousand, two hundred thirteen".