616910121 has 32 divisors (see below), whose sum is σ = 944634240. Its totient is φ = 397656000.

The previous prime is 616910111. The next prime is 616910123. The reversal of 616910121 is 121019616.

It is not a de Polignac number, because 616910121 - 2¹¹ = 616908073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (616910123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 114631 + ... + 119891.

It is an arithmetic number, because the mean of its divisors is an integer number (29519820).

Almost surely, 2^616910121 is an apocalyptic number.

It is an amenable number.

616910121 is a deficient number, since it is larger than the sum of its proper divisors (327724119).

616910121 is a wasteful number, since it uses less digits than its factorization.

616910121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5414 (or 5408 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 616910121 is about 24837.6754347101. The cubic root of 616910121 is about 851.2830086756.

Adding to 616910121 its reverse (121019616), we get a palindrome (737929737).

It can be divided in two parts, 6169 and 10121, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 616910121 in words is "six hundred sixteen million, nine hundred ten thousand, one hundred twenty-one".