77771408724716 has 48 divisors (see below), whose sum is σ = 155712697014336. Its totient is φ = 33294220452864.

The previous prime is 77771408724547. The next prime is 77771408724719. The reversal of 77771408724716 is 61742780417777.

It is not an unprimeable number, because it can be changed into a prime (77771408724719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95869640 + ... + 96677456.

It is an arithmetic number, because the mean of its divisors is an integer number (3244014521132).

Almost surely, 2^{77771408724716} is an apocalyptic number.

It is an amenable number.

77771408724716 is an abundant number, since it is smaller than the sum of its proper divisors (77941288289620).

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

77771408724716 is a wasteful number, since it uses less digits than its factorization.

77771408724716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811578 (or 811576 counting only the distinct ones).

The product of its (nonzero) digits is 180708864, while the sum is 68.

The spelling of 77771408724716 in words is "seventy-seven trillion, seven hundred seventy-one billion, four hundred eight million, seven hundred twenty-four thousand, seven hundred sixteen".