61551163110231 has 48 divisors (see below), whose sum is σ = 94333782816000. Its totient is φ = 38539649491200.

The previous prime is 61551163110193. The next prime is 61551163110257. The reversal of 61551163110231 is 13201136115516.

61551163110231 is a `hidden beast` number, since 6 + 1 + 5 + 5 + 1 + 1 + 631 + 10 + 2 + 3 + 1 = 666.

It is not a de Polignac number, because 61551163110231 - 2⁷ = 61551163110103 is a prime.

It is a super-2 number, since 2×61551163110231² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551163510231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1141437036 + ... + 1141490958.

It is an arithmetic number, because the mean of its divisors is an integer number (1965287142000).

Almost surely, 2^{61551163110231} is an apocalyptic number.

61551163110231 is a deficient number, since it is larger than the sum of its proper divisors (32782619705769).

61551163110231 is a wasteful number, since it uses less digits than its factorization.

61551163110231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69396 (or 69393 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

Adding to 61551163110231 its reverse (13201136115516), we get a palindrome (74752299225747).

The spelling of 61551163110231 in words is "sixty-one trillion, five hundred fifty-one billion, one hundred sixty-three million, one hundred ten thousand, two hundred thirty-one".