77555161191 has 8 divisors (see below), whose sum is σ = 108849349120. Its totient is φ = 48982207032.

The previous prime is 77555161181. The next prime is 77555161207. The reversal of 77555161191 is 19116155577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77555161191 - 2⁶ = 77555161127 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77555161191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77555161181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680308375 + ... + 680308488.

It is an arithmetic number, because the mean of its divisors is an integer number (13606168640).

Almost surely, 2^77555161191 is an apocalyptic number.

77555161191 is a deficient number, since it is larger than the sum of its proper divisors (31294187929).

77555161191 is a wasteful number, since it uses less digits than its factorization.

77555161191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360616885.

The product of its digits is 330750, while the sum is 48.

The spelling of 77555161191 in words is "seventy-seven billion, five hundred fifty-five million, one hundred sixty-one thousand, one hundred ninety-one".