78280651338 has 16 divisors (see below), whose sum is σ = 156567917856. Its totient is φ = 26092447920.

The previous prime is 78280651289. The next prime is 78280651343. The reversal of 78280651338 is 83315608287.

It is a super-2 number, since 2×78280651338² (a number of 23 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 114556 + ... + 411927.

It is an arithmetic number, because the mean of its divisors is an integer number (9785494866).

Almost surely, 2^78280651338 is an apocalyptic number.

78280651338 is an abundant number, since it is smaller than the sum of its proper divisors (78287266518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78280651338 is a wasteful number, since it uses less digits than its factorization.

78280651338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551269.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 78280651338 in words is "seventy-eight billion, two hundred eighty million, six hundred fifty-one thousand, three hundred thirty-eight".