7208861336645 has 8 divisors (see below), whose sum is σ = 8663720799480. Its totient is φ = 5758364272320.

The previous prime is 7208861336591. The next prime is 7208861336681. The reversal of 7208861336645 is 5466331688027.

It can be written as a sum of positive squares in 4 ways, for example, as 61932792769 + 7146928543876 = 248863^2 + 2673374^2 .

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

It is not a de Polignac number, because 7208861336645 - 2¹² = 7208861332549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1090595990 + ... + 1090602599.

It is an arithmetic number, because the mean of its divisors is an integer number (1082965099935).

Almost surely, 2^{7208861336645} is an apocalyptic number.

It is an amenable number.

7208861336645 is a deficient number, since it is larger than the sum of its proper divisors (1454859462835).

7208861336645 is a wasteful number, since it uses less digits than its factorization.

7208861336645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181199255.

The product of its (nonzero) digits is 34836480, while the sum is 59.

The spelling of 7208861336645 in words is "seven trillion, two hundred eight billion, eight hundred sixty-one million, three hundred thirty-six thousand, six hundred forty-five".