845690800078 has 4 divisors (see below), whose sum is σ = 1268536200120. Its totient is φ = 422845400038.

The previous prime is 845690800063. The next prime is 845690800111. The reversal of 845690800078 is 870008096548.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211422700018 + ... + 211422700021.

It is an arithmetic number, because the mean of its divisors is an integer number (317134050030).

Almost surely, 2^845690800078 is an apocalyptic number.

845690800078 is a deficient number, since it is larger than the sum of its proper divisors (422845400042).

845690800078 is a wasteful number, since it uses less digits than its factorization.

845690800078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422845400041.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 845690800078 in words is "eight hundred forty-five billion, six hundred ninety million, eight hundred thousand, seventy-eight".