77745600654778 has 48 divisors (see below), whose sum is σ = 135759257884800. Its totient is φ = 33294712061184.

The previous prime is 77745600654769. The next prime is 77745600654809. The reversal of 77745600654778 is 87745600654777.

It is a self number, because there is not a number n which added to its sum of digits gives 77745600654778.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1688300298 + ... + 1688346346.

It is an arithmetic number, because the mean of its divisors is an integer number (2828317872600).

Almost surely, 2^{77745600654778} is an apocalyptic number.

77745600654778 is a deficient number, since it is larger than the sum of its proper divisors (58013657230022).

77745600654778 is a wasteful number, since it uses less digits than its factorization.

77745600654778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58531 (or 58524 counting only the distinct ones).

The product of its (nonzero) digits is 1936166400, while the sum is 73.

Subtracting 77745600654778 from its reverse (87745600654777), we obtain a palindrome (9999999999999).

The spelling of 77745600654778 in words is "seventy-seven trillion, seven hundred forty-five billion, six hundred million, six hundred fifty-four thousand, seven hundred seventy-eight".