78886956477 has 16 divisors (see below), whose sum is σ = 120251671040. Its totient is φ = 45062145072.

The previous prime is 78886956437. The next prime is 78886956493. The reversal of 78886956477 is 77465968887.

It is not a de Polignac number, because 78886956477 - 2¹¹ = 78886954429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78886956399 and 78886956408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78886956437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611227 + ... + 728952.

It is an arithmetic number, because the mean of its divisors is an integer number (7515729440).

Almost surely, 2^78886956477 is an apocalyptic number.

It is an amenable number.

78886956477 is a deficient number, since it is larger than the sum of its proper divisors (41364714563).

78886956477 is a wasteful number, since it uses less digits than its factorization.

78886956477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342992.

The product of its digits is 1137991680, while the sum is 75.

The spelling of 78886956477 in words is "seventy-eight billion, eight hundred eighty-six million, nine hundred fifty-six thousand, four hundred seventy-seven".