61412437561 has 8 divisors (see below), whose sum is σ = 63216231624. Its totient is φ = 59632535040.

The previous prime is 61412437543. The next prime is 61412437613. The reversal of 61412437561 is 16573421416.

It can be written as a sum of positive squares in 4 ways, for example, as 1228081936 + 60184355625 = 35044^2 + 245325^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 61412437561 - 2¹³ = 61412429369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61412437061) 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, 5967670 + ... + 5977951.

It is an arithmetic number, because the mean of its divisors is an integer number (7902028953).

Almost surely, 2^61412437561 is an apocalyptic number.

It is an amenable number.

61412437561 is a deficient number, since it is larger than the sum of its proper divisors (1803794063).

61412437561 is a wasteful number, since it uses less digits than its factorization.

61412437561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11945771.

The product of its digits is 120960, while the sum is 40.

Adding to 61412437561 its reverse (16573421416), we get a palindrome (77985858977).

The spelling of 61412437561 in words is "sixty-one billion, four hundred twelve million, four hundred thirty-seven thousand, five hundred sixty-one".