77455552171 has 16 divisors (see below), whose sum is σ = 83000966400. Its totient is φ = 72059627808.

The previous prime is 77455552117. The next prime is 77455552177. The reversal of 77455552171 is 17125555477.

It is a cyclic number.

It is not a de Polignac number, because 77455552171 - 2¹⁵ = 77455519403 is a prime.

It is a super-2 number, since 2×77455552171² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77455552177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048281 + ... + 1119733.

It is an arithmetic number, because the mean of its divisors is an integer number (5187560400).

Almost surely, 2^77455552171 is an apocalyptic number.

77455552171 is a deficient number, since it is larger than the sum of its proper divisors (5545414229).

77455552171 is a wasteful number, since it uses less digits than its factorization.

77455552171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72498.

The product of its digits is 1715000, while the sum is 49.

The spelling of 77455552171 in words is "seventy-seven billion, four hundred fifty-five million, five hundred fifty-two thousand, one hundred seventy-one".