577777661264161 has 8 divisors (see below), whose sum is σ = 611772601457664. Its totient is φ = 543783612064320.

The previous prime is 577777661264159. The next prime is 577777661264191. The reversal of 577777661264161 is 161462166777775.

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

It is a cyclic number.

It is not a de Polignac number, because 577777661264161 - 2¹ = 577777661264159 is a prime.

It is a super-3 number, since 3×577777661264161³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (577777661264191) 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, 221413105 + ... + 224007406.

It is an arithmetic number, because the mean of its divisors is an integer number (76471575182208).

Almost surely, 2^{577777661264161} is an apocalyptic number.

It is an amenable number.

577777661264161 is a deficient number, since it is larger than the sum of its proper divisors (33994940193503).

577777661264161 is a wasteful number, since it uses less digits than its factorization.

577777661264161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445496831.

The product of its digits is 871274880, while the sum is 73.

The spelling of 577777661264161 in words is "five hundred seventy-seven trillion, seven hundred seventy-seven billion, six hundred sixty-one million, two hundred sixty-four thousand, one hundred sixty-one".