77840712017764 has 24 divisors (see below), whose sum is σ = 138766077686880. Its totient is φ = 38195508840576.

The previous prime is 77840712017729. The next prime is 77840712017767. The reversal of 77840712017764 is 46771021704877.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77840712017767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280809957 + ... + 281087020.

It is an arithmetic number, because the mean of its divisors is an integer number (5781919903620).

Almost surely, 2^{77840712017764} is an apocalyptic number.

It is an amenable number.

77840712017764 is a deficient number, since it is larger than the sum of its proper divisors (60925365669116).

77840712017764 is a wasteful number, since it uses less digits than its factorization.

77840712017764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561897627 (or 561897625 counting only the distinct ones).

The product of its (nonzero) digits is 25815552, while the sum is 61.

The spelling of 77840712017764 in words is "seventy-seven trillion, eight hundred forty billion, seven hundred twelve million, seventeen thousand, seven hundred sixty-four".