61606426225 has 36 divisors (see below), whose sum is σ = 83948505300. Its totient is φ = 44786344960.

The previous prime is 61606426207. The next prime is 61606426237. The reversal of 61606426225 is 52262460616.

61606426225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 18 ways, for example, as 20487914496 + 41118511729 = 143136^2 + 202777^2 .

It is not a de Polignac number, because 61606426225 - 2²³ = 61598037617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 62511 + ... + 356539.

It is an arithmetic number, because the mean of its divisors is an integer number (2331902925).

Almost surely, 2^61606426225 is an apocalyptic number.

It is an amenable number.

61606426225 is a deficient number, since it is larger than the sum of its proper divisors (22342079075).

61606426225 is a wasteful number, since it uses less digits than its factorization.

61606426225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294102 (or 294080 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 61606426225 in words is "sixty-one billion, six hundred six million, four hundred twenty-six thousand, two hundred twenty-five".