61611645106023 has 16 divisors (see below), whose sum is σ = 83166108480000. Its totient is φ = 40566133318784.

The previous prime is 61611645106019. The next prime is 61611645106031. The reversal of 61611645106023 is 32060154611616.

It is a cyclic number.

It is not a de Polignac number, because 61611645106023 - 2² = 61611645106019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61611645116023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40172898 + ... + 41678351.

It is an arithmetic number, because the mean of its divisors is an integer number (5197881780000).

Almost surely, 2^{61611645106023} is an apocalyptic number.

61611645106023 is a deficient number, since it is larger than the sum of its proper divisors (21554463373977).

61611645106023 is a wasteful number, since it uses less digits than its factorization.

61611645106023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81854358.

The product of its (nonzero) digits is 155520, while the sum is 42.

Adding to 61611645106023 its reverse (32060154611616), we get a palindrome (93671799717639).

The spelling of 61611645106023 in words is "sixty-one trillion, six hundred eleven billion, six hundred forty-five million, one hundred six thousand, twenty-three".