78467082251 has 4 divisors (see below), whose sum is σ = 78510412104. Its totient is φ = 78423752400.

The previous prime is 78467082247. The next prime is 78467082263. The reversal of 78467082251 is 15228076487.

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 78467082251 - 2² = 78467082247 is a prime.

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 78467082251.

It is not an unprimeable number, because it can be changed into a prime (78467082241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21662210 + ... + 21665831.

It is an arithmetic number, because the mean of its divisors is an integer number (19627603026).

Almost surely, 2^78467082251 is an apocalyptic number.

78467082251 is a deficient number, since it is larger than the sum of its proper divisors (43329853).

78467082251 is a wasteful number, since it uses less digits than its factorization.

78467082251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43329852.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 78467082251 in words is "seventy-eight billion, four hundred sixty-seven million, eighty-two thousand, two hundred fifty-one".