77734863566141 has 4 divisors (see below), whose sum is σ = 79630835848284. Its totient is φ = 75838891284000.

The previous prime is 77734863566021. The next prime is 77734863566167. The reversal of 77734863566141 is 14166536843777.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3908034765625 + 73826828800516 = 1976875^2 + 8592254^2 .

It is a cyclic number.

It is not a de Polignac number, because 77734863566141 - 2²² = 77734859371837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77734863566341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947986141010 + ... + 947986141091.

It is an arithmetic number, because the mean of its divisors is an integer number (19907708962071).

Almost surely, 2^{77734863566141} is an apocalyptic number.

It is an amenable number.

77734863566141 is a deficient number, since it is larger than the sum of its proper divisors (1895972282143).

77734863566141 is a wasteful number, since it uses less digits than its factorization.

77734863566141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895972282142.

The product of its digits is 426746880, while the sum is 68.

The spelling of 77734863566141 in words is "seventy-seven trillion, seven hundred thirty-four billion, eight hundred sixty-three million, five hundred sixty-six thousand, one hundred forty-one".