77805360435764 has 12 divisors (see below), whose sum is σ = 146633179282884. Its totient is φ = 35910166354944.

The previous prime is 77805360435749. The next prime is 77805360435821. The reversal of 77805360435764 is 46753406350877.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40084979812900 + 37720380622864 = 6331270^2 + 6141692^2 .

It is a super-2 number, since 2×77805360435764² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77805360435764.

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, 748128465677 + ... + 748128465780.

It is an arithmetic number, because the mean of its divisors is an integer number (12219431606907).

Almost surely, 2^{77805360435764} is an apocalyptic number.

It is an amenable number.

77805360435764 is a deficient number, since it is larger than the sum of its proper divisors (68827818847120).

77805360435764 is a wasteful number, since it uses less digits than its factorization.

77805360435764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496256931474 (or 1496256931472 counting only the distinct ones).

The product of its (nonzero) digits is 355622400, while the sum is 65.

The spelling of 77805360435764 in words is "seventy-seven trillion, eight hundred five billion, three hundred sixty million, four hundred thirty-five thousand, seven hundred sixty-four".