78280638108223 has 4 divisors (see below), whose sum is σ = 78280711182288. Its totient is φ = 78280565034160.

The previous prime is 78280638108187. The next prime is 78280638108263. The reversal of 78280638108223 is 32280183608287.

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

It is a cyclic number.

It is not a de Polignac number, because 78280638108223 - 2³⁷ = 78143199154751 is a prime.

It is a super-2 number, since 2×78280638108223² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78280638108263) 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, 34905883 + ... + 37080748.

It is an arithmetic number, because the mean of its divisors is an integer number (19570177795572).

Almost surely, 2^{78280638108223} is an apocalyptic number.

78280638108223 is a deficient number, since it is larger than the sum of its proper divisors (73074065).

78280638108223 is a wasteful number, since it uses less digits than its factorization.

78280638108223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73074064.

The product of its (nonzero) digits is 12386304, while the sum is 58.

The spelling of 78280638108223 in words is "seventy-eight trillion, two hundred eighty billion, six hundred thirty-eight million, one hundred eight thousand, two hundred twenty-three".