61736044404121 has 4 divisors (see below), whose sum is σ = 61737445661200. Its totient is φ = 61734643147044.

The previous prime is 61736044404113. The next prime is 61736044404137. The reversal of 61736044404121 is 12140444063716.

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 61736044404121 - 2³ = 61736044404113 is a prime.

It is a super-2 number, since 2×61736044404121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61736344404121) 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, 700562451 + ... + 700650568.

It is an arithmetic number, because the mean of its divisors is an integer number (15434361415300).

Almost surely, 2^{61736044404121} is an apocalyptic number.

It is an amenable number.

61736044404121 is a deficient number, since it is larger than the sum of its proper divisors (1401257079).

61736044404121 is a wasteful number, since it uses less digits than its factorization.

61736044404121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401257078.

The product of its (nonzero) digits is 387072, while the sum is 43.

Adding to 61736044404121 its reverse (12140444063716), we get a palindrome (73876488467837).

The spelling of 61736044404121 in words is "sixty-one trillion, seven hundred thirty-six billion, forty-four million, four hundred four thousand, one hundred twenty-one".