616551822152 has 36 divisors (see below), whose sum is σ = 1344808929555. Its totient is φ = 264229832496.

The previous prime is 616551822121. The next prime is 616551822179. The reversal of 616551822152 is 251228155616.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 308275911076 + 308275911076 = 555226^2 + 555226^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=555226.

It is a super-3 number, since 3×616551822152³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15526499 + ... + 15566157.

Almost surely, 2^616551822152 is an apocalyptic number.

It is an amenable number.

616551822152 is an abundant number, since it is smaller than the sum of its proper divisors (728257107403).

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

616551822152 is an frugal number, since it uses more digits than its factorization.

616551822152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79338 (or 39668 counting only the distinct ones).

The product of its digits is 288000, while the sum is 44.

Adding to 616551822152 its reverse (251228155616), we get a palindrome (867779977768).

The spelling of 616551822152 in words is "six hundred sixteen billion, five hundred fifty-one million, eight hundred twenty-two thousand, one hundred fifty-two".