7872166644358 has 4 divisors (see below), whose sum is σ = 11808249966540. Its totient is φ = 3936083322178.

The previous prime is 7872166644347. The next prime is 7872166644367. The reversal of 7872166644358 is 8534466612787.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 7872166644293 and 7872166644302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968041661088 + ... + 1968041661091.

It is an arithmetic number, because the mean of its divisors is an integer number (2952062491635).

Almost surely, 2^{7872166644358} is an apocalyptic number.

7872166644358 is a deficient number, since it is larger than the sum of its proper divisors (3936083322182).

7872166644358 is a wasteful number, since it uses less digits than its factorization.

7872166644358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936083322181.

The product of its digits is 325140480, while the sum is 67.

The spelling of 7872166644358 in words is "seven trillion, eight hundred seventy-two billion, one hundred sixty-six million, six hundred forty-four thousand, three hundred fifty-eight".