78246856481 has 4 divisors (see below), whose sum is σ = 78250322112. Its totient is φ = 78243390852.

The previous prime is 78246856463. The next prime is 78246856483. The reversal of 78246856481 is 18465864287.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78246856481 - 2²⁶ = 78179747617 is a prime.

It is a super-2 number, since 2×78246856481² (a number of 23 digits) contains 22 as substring.

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 78246856481.

It is not an unprimeable number, because it can be changed into a prime (78246856483) 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, 1698725 + ... + 1744178.

It is an arithmetic number, because the mean of its divisors is an integer number (19562580528).

Almost surely, 2^78246856481 is an apocalyptic number.

It is an amenable number.

78246856481 is a deficient number, since it is larger than the sum of its proper divisors (3465631).

78246856481 is a wasteful number, since it uses less digits than its factorization.

78246856481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465630.

The product of its digits is 20643840, while the sum is 59.

The spelling of 78246856481 in words is "seventy-eight billion, two hundred forty-six million, eight hundred fifty-six thousand, four hundred eighty-one".