202778181222961 has 16 divisors (see below), whose sum is σ = 219950201314368. Its totient is φ = 186189118528000.

The previous prime is 202778181222931. The next prime is 202778181222971. The reversal of 202778181222961 is 169222181877202.

It is a cyclic number.

It is not a de Polignac number, because 202778181222961 - 2⁷ = 202778181222833 is a prime.

It is a super-2 number, since 2×202778181222961² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202778181222896 and 202778181222905.

It is not an unprimeable number, because it can be changed into a prime (202778181222931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16788066 + ... + 26218228.

It is an arithmetic number, because the mean of its divisors is an integer number (13746887582148).

Almost surely, 2^{202778181222961} is an apocalyptic number.

It is an amenable number.

202778181222961 is a deficient number, since it is larger than the sum of its proper divisors (17172020091407).

202778181222961 is a wasteful number, since it uses less digits than its factorization.

202778181222961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9461072.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 202778181222961 in words is "two hundred two trillion, seven hundred seventy-eight billion, one hundred eighty-one million, two hundred twenty-two thousand, nine hundred sixty-one".