77411842561 has 16 divisors (see below), whose sum is σ = 80107372800. Its totient is φ = 74755457280.

The previous prime is 77411842553. The next prime is 77411842663. The reversal of 77411842561 is 16524811477.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77411842561 - 2³ = 77411842553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77411842531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16648965 + ... + 16653613.

It is an arithmetic number, because the mean of its divisors is an integer number (5006710800).

Almost surely, 2^77411842561 is an apocalyptic number.

It is an amenable number.

77411842561 is a deficient number, since it is larger than the sum of its proper divisors (2695530239).

77411842561 is a wasteful number, since it uses less digits than its factorization.

77411842561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8736.

The product of its digits is 376320, while the sum is 46.

The spelling of 77411842561 in words is "seventy-seven billion, four hundred eleven million, eight hundred forty-two thousand, five hundred sixty-one".