61150561 has 4 divisors (see below), whose sum is σ = 61188912. Its totient is φ = 61112212.

The previous prime is 61150559. The next prime is 61150571. The reversal of 61150561 is 16505116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61150561 - 2¹ = 61150559 is a prime.

It is a super-2 number, since 2×61150561² = 7478782221229442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61150571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16675 + ... + 20008.

It is an arithmetic number, because the mean of its divisors is an integer number (15297228).

Almost surely, 2^61150561 is an apocalyptic number.

It is an amenable number.

61150561 is a deficient number, since it is larger than the sum of its proper divisors (38351).

61150561 is a wasteful number, since it uses less digits than its factorization.

61150561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38350.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 61150561 is about 7819.8824159958. The cubic root of 61150561 is about 393.9733226803.

Adding to 61150561 its reverse (16505116), we get a palindrome (77655677).

The spelling of 61150561 in words is "sixty-one million, one hundred fifty thousand, five hundred sixty-one".