78456722577 has 8 divisors (see below), whose sum is σ = 104623706880. Its totient is φ = 52297110000.

The previous prime is 78456722521. The next prime is 78456722621. The reversal of 78456722577 is 77522765487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78456722577 - 2¹² = 78456718481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78456722577.

It is not an unprimeable number, because it can be changed into a prime (78456727577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818049 + ... + 1860702.

It is an arithmetic number, because the mean of its divisors is an integer number (13077963360).

Almost surely, 2^78456722577 is an apocalyptic number.

It is an amenable number.

78456722577 is a deficient number, since it is larger than the sum of its proper divisors (26166984303).

78456722577 is a wasteful number, since it uses less digits than its factorization.

78456722577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685863.

The product of its digits is 46099200, while the sum is 60.

The spelling of 78456722577 in words is "seventy-eight billion, four hundred fifty-six million, seven hundred twenty-two thousand, five hundred seventy-seven".