77181810045048 has 80 divisors (see below), whose sum is σ = 216187872539760. Its totient is φ = 25726396521600.

The previous prime is 77181810045007. The next prime is 77181810045073. The reversal of 77181810045048 is 84054001818177.

77181810045048 is a `hidden beast` number, since 7 + 7 + 1 + 8 + 181 + 0 + 0 + 450 + 4 + 8 = 666.

77181810045048 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 77181810044985 and 77181810045003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17219668 + ... + 21233948.

It is an arithmetic number, because the mean of its divisors is an integer number (2702348406747).

Almost surely, 2^{77181810045048} is an apocalyptic number.

It is an amenable number.

77181810045048 is an abundant number, since it is smaller than the sum of its proper divisors (139006062494712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77181810045048 is a wasteful number, since it uses less digits than its factorization.

77181810045048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043970 (or 4043957 counting only the distinct ones).

The product of its (nonzero) digits is 2007040, while the sum is 54.

The spelling of 77181810045048 in words is "seventy-seven trillion, one hundred eighty-one billion, eight hundred ten million, forty-five thousand, forty-eight".