61435561 has 8 divisors (see below), whose sum is σ = 67636800. Its totient is φ = 55337040.

The previous prime is 61435547. The next prime is 61435597. The reversal of 61435561 is 16553416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61435561 - 2⁵ = 61435529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61435541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24421 + ... + 26818.

It is an arithmetic number, because the mean of its divisors is an integer number (8454600).

Almost surely, 2^61435561 is an apocalyptic number.

It is an amenable number.

61435561 is a deficient number, since it is larger than the sum of its proper divisors (6201239).

61435561 is a wasteful number, since it uses less digits than its factorization.

61435561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51359.

The product of its digits is 10800, while the sum is 31.

The square root of 61435561 is about 7838.0840133288. The cubic root of 61435561 is about 394.5844286124.

Adding to 61435561 its reverse (16553416), we get a palindrome (77988977).

It can be divided in two parts, 614355 and 61, that added together give a palindrome (614416).

The spelling of 61435561 in words is "sixty-one million, four hundred thirty-five thousand, five hundred sixty-one".