77420711585 has 64 divisors (see below), whose sum is σ = 117772434432. Its totient is φ = 47605088256.

The previous prime is 77420711569. The next prime is 77420711593. The reversal of 77420711585 is 58511702477.

It is a cyclic number.

It is not a de Polignac number, because 77420711585 - 2⁴ = 77420711569 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3506039 + ... + 3528051.

It is an arithmetic number, because the mean of its divisors is an integer number (1840194288).

Almost surely, 2^77420711585 is an apocalyptic number.

It is an amenable number.

77420711585 is a deficient number, since it is larger than the sum of its proper divisors (40351722847).

77420711585 is a wasteful number, since it uses less digits than its factorization.

77420711585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22322.

The product of its (nonzero) digits is 548800, while the sum is 47.

The spelling of 77420711585 in words is "seventy-seven billion, four hundred twenty million, seven hundred eleven thousand, five hundred eighty-five".