78855658562644 has 12 divisors (see below), whose sum is σ = 143997289549344. Its totient is φ = 37713575834264.

The previous prime is 78855658562623. The next prime is 78855658562651. The reversal of 78855658562644 is 44626585655887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428563361662 + ... + 428563361845.

It is an arithmetic number, because the mean of its divisors is an integer number (11999774129112).

Almost surely, 2^{78855658562644} is an apocalyptic number.

It is an amenable number.

78855658562644 is a deficient number, since it is larger than the sum of its proper divisors (65141630986700).

78855658562644 is a wasteful number, since it uses less digits than its factorization.

78855658562644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857126723534 (or 857126723532 counting only the distinct ones).

The product of its digits is 15482880000, while the sum is 79.

The spelling of 78855658562644 in words is "seventy-eight trillion, eight hundred fifty-five billion, six hundred fifty-eight million, five hundred sixty-two thousand, six hundred forty-four".