78545334000641 has 4 divisors (see below), whose sum is σ = 81960348522432. Its totient is φ = 75130319478852.

The previous prime is 78545334000613. The next prime is 78545334000667. The reversal of 78545334000641 is 14600043354587.

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 78545334000641 - 2¹⁸ = 78545333738497 is a prime.

It is a super-2 number, since 2×78545334000641² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78545334000641.

It is not an unprimeable number, because it can be changed into a prime (78545334000041) 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, 1707507260861 + ... + 1707507260906.

It is an arithmetic number, because the mean of its divisors is an integer number (20490087130608).

Almost surely, 2^{78545334000641} is an apocalyptic number.

It is an amenable number.

78545334000641 is a deficient number, since it is larger than the sum of its proper divisors (3415014521791).

78545334000641 is a wasteful number, since it uses less digits than its factorization.

78545334000641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3415014521790.

The product of its (nonzero) digits is 4838400, while the sum is 50.

The spelling of 78545334000641 in words is "seventy-eight trillion, five hundred forty-five billion, three hundred thirty-four million, six hundred forty-one", and thus it is an aban number.