77663563041212 has 12 divisors (see below), whose sum is σ = 135911387140536. Its totient is φ = 38831738143920.

The previous prime is 77663563041161. The next prime is 77663563041293. The reversal of 77663563041212 is 21214036536677.

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, 6634058 + ... + 14118705.

It is an arithmetic number, because the mean of its divisors is an integer number (11325948928378).

Almost surely, 2^{77663563041212} is an apocalyptic number.

It is an amenable number.

77663563041212 is a deficient number, since it is larger than the sum of its proper divisors (58247824099324).

77663563041212 is a wasteful number, since it uses less digits than its factorization.

77663563041212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21688348 (or 21688346 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 53.

Adding to 77663563041212 its reverse (21214036536677), we get a palindrome (98877599577889).

The spelling of 77663563041212 in words is "seventy-seven trillion, six hundred sixty-three billion, five hundred sixty-three million, forty-one thousand, two hundred twelve".