56616129 has 6 divisors (see below), whose sum is σ = 81778866. Its totient is φ = 37744080.

The previous prime is 56616127. The next prime is 56616151. The reversal of 56616129 is 92161665.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 3908529 = 7260^2 + 1977^2 .

It is not a de Polignac number, because 56616129 - 2¹ = 56616127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56616093 and 56616102.

It is not an unprimeable number, because it can be changed into a prime (56616127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3145332 + ... + 3145349.

It is an arithmetic number, because the mean of its divisors is an integer number (13629811).

Almost surely, 2^56616129 is an apocalyptic number.

It is an amenable number.

56616129 is a deficient number, since it is larger than the sum of its proper divisors (25162737).

56616129 is a wasteful number, since it uses less digits than its factorization.

56616129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6290687 (or 6290684 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 56616129 is about 7524.3690100898. The cubic root of 56616129 is about 383.9842319372.

The spelling of 56616129 in words is "fifty-six million, six hundred sixteen thousand, one hundred twenty-nine".