77402085577 has 16 divisors (see below), whose sum is σ = 79825150080. Its totient is φ = 75018333312.

The previous prime is 77402085533. The next prime is 77402085581. The reversal of 77402085577 is 77558020477.

It is a cyclic number.

It is not a de Polignac number, because 77402085577 - 2¹⁵ = 77402052809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77402085517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2215398 + ... + 2250064.

It is an arithmetic number, because the mean of its divisors is an integer number (4989071880).

Almost surely, 2^77402085577 is an apocalyptic number.

It is an amenable number.

77402085577 is a deficient number, since it is larger than the sum of its proper divisors (2423064503).

77402085577 is a wasteful number, since it uses less digits than its factorization.

77402085577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35232.

The product of its (nonzero) digits is 3841600, while the sum is 52.

The spelling of 77402085577 in words is "seventy-seven billion, four hundred two million, eighty-five thousand, five hundred seventy-seven".