61044044025 has 24 divisors (see below), whose sum is σ = 101298607744. Its totient is φ = 32436676800.

The previous prime is 61044044021. The next prime is 61044044077. The reversal of 61044044025 is 52044044016.

It is a happy number.

It is not a de Polignac number, because 61044044025 - 2² = 61044044021 is a prime.

It is a super-2 number, since 2×61044044025² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61044043983 and 61044044001.

It is not an unprimeable number, because it can be changed into a prime (61044044021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1481374 + ... + 1522023.

Almost surely, 2^61044044025 is an apocalyptic number.

It is an amenable number.

61044044025 is a deficient number, since it is larger than the sum of its proper divisors (40254563719).

61044044025 is a wasteful number, since it uses less digits than its factorization.

61044044025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003681 (or 3003676 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Subtracting from 61044044025 its reverse (52044044016), we obtain a palindrome (9000000009).

The spelling of 61044044025 in words is "sixty-one billion, forty-four million, forty-four thousand, twenty-five".