616221165258 has 24 divisors (see below), whose sum is σ = 1335189377028. Its totient is φ = 205400359872.

The previous prime is 616221165257. The next prime is 616221165319. The reversal of 616221165258 is 852561122616.

616221165258 is a `hidden beast` number, since 6 + 1 + 6 + 2 + 2 + 116 + 525 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 596575498689 + 19645666569 = 772383^2 + 140163^2 .

It is a super-3 number, since 3×616221165258³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (616221165257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26166 + ... + 1110462.

Almost surely, 2^616221165258 is an apocalyptic number.

616221165258 is an abundant number, since it is smaller than the sum of its proper divisors (718968211770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616221165258 is a wasteful number, since it uses less digits than its factorization.

616221165258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115878 (or 1115875 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 616221165258 in words is "six hundred sixteen billion, two hundred twenty-one million, one hundred sixty-five thousand, two hundred fifty-eight".