255615777777 has 8 divisors (see below), whose sum is σ = 343837152864. Its totient is φ = 168902460608.

The previous prime is 255615777709. The next prime is 255615777779. The reversal of 255615777777 is 777777516552.

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 255615777777 - 2¹⁵ = 255615745009 is a prime.

It is a super-3 number, since 3×255615777777³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (255615777779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377014083 + ... + 377014760.

It is an arithmetic number, because the mean of its divisors is an integer number (42979644108).

Almost surely, 2^255615777777 is an apocalyptic number.

It is an amenable number.

255615777777 is a deficient number, since it is larger than the sum of its proper divisors (88221375087).

255615777777 is a wasteful number, since it uses less digits than its factorization.

255615777777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754028959.

The product of its digits is 176473500, while the sum is 66.

The spelling of 255615777777 in words is "two hundred fifty-five billion, six hundred fifteen million, seven hundred seventy-seven thousand, seven hundred seventy-seven".