61605223131061 has 8 divisors (see below), whose sum is σ = 61984627104960. Its totient is φ = 61225944281568.

The previous prime is 61605223131047. The next prime is 61605223131077. The reversal of 61605223131061 is 16013132250616.

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 61605223131061 - 2¹⁹ = 61605222606773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61605223131061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61605223134061) 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, 30293271 + ... + 32262868.

It is an arithmetic number, because the mean of its divisors is an integer number (7748078388120).

Almost surely, 2^{61605223131061} is an apocalyptic number.

It is an amenable number.

61605223131061 is a deficient number, since it is larger than the sum of its proper divisors (379403973899).

61605223131061 is a wasteful number, since it uses less digits than its factorization.

61605223131061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62562203.

The product of its (nonzero) digits is 38880, while the sum is 37.

Adding to 61605223131061 its reverse (16013132250616), we get a palindrome (77618355381677).

The spelling of 61605223131061 in words is "sixty-one trillion, six hundred five billion, two hundred twenty-three million, one hundred thirty-one thousand, sixty-one".