775775617121 has 8 divisors (see below), whose sum is σ = 802637518080. Its totient is φ = 748921117392.

The previous prime is 775775617069. The next prime is 775775617129. The reversal of 775775617121 is 121716577577.

It is a happy number.

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 775775617121 - 2²⁶ = 775708508257 is a prime.

It is a super-3 number, since 3×775775617121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775775617129) 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, 1636625 + ... + 2056718.

It is an arithmetic number, because the mean of its divisors is an integer number (100329689760).

Almost surely, 2^775775617121 is an apocalyptic number.

It is an amenable number.

775775617121 is a deficient number, since it is larger than the sum of its proper divisors (26861900959).

775775617121 is a wasteful number, since it uses less digits than its factorization.

775775617121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700615.

The product of its digits is 5042100, while the sum is 56.

The spelling of 775775617121 in words is "seven hundred seventy-five billion, seven hundred seventy-five million, six hundred seventeen thousand, one hundred twenty-one".