78280075360826 has 4 divisors (see below), whose sum is σ = 117420113041242. Its totient is φ = 39140037680412.

The previous prime is 78280075360787. The next prime is 78280075360853. The reversal of 78280075360826 is 62806357008287.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 46638314100625 + 31641761260201 = 6829225^2 + 5625101^2 .

It is a super-2 number, since 2×78280075360826² (a number of 29 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 as a sum of consecutive naturals, namely, 19570018840205 + ... + 19570018840208.

Almost surely, 2^{78280075360826} is an apocalyptic number.

78280075360826 is a deficient number, since it is larger than the sum of its proper divisors (39140037680416).

78280075360826 is a wasteful number, since it uses less digits than its factorization.

78280075360826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39140037680415.

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 78280075360826 in words is "seventy-eight trillion, two hundred eighty billion, seventy-five million, three hundred sixty thousand, eight hundred twenty-six".