12331061635551 has 8 divisors (see below), whose sum is σ = 16686809775744. Its totient is φ = 8098010626200.

The previous prime is 12331061635523. The next prime is 12331061635561. The reversal of 12331061635551 is 15553616013321.

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

It is not a de Polignac number, because 12331061635551 - 2²⁶ = 12330994526687 is a prime.

It is a super-4 number, since 4×12331061635551⁴ (a number of 53 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12331061635561) 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, 30674282475 + ... + 30674282876.

It is an arithmetic number, because the mean of its divisors is an integer number (2085851221968).

Almost surely, 2^{12331061635551} is an apocalyptic number.

12331061635551 is a deficient number, since it is larger than the sum of its proper divisors (4355748140193).

12331061635551 is an equidigital number, since it uses as much as digits as its factorization.

12331061635551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61348565421.

The product of its (nonzero) digits is 243000, while the sum is 42.

Adding to 12331061635551 its reverse (15553616013321), we get a palindrome (27884677648872).

The spelling of 12331061635551 in words is "twelve trillion, three hundred thirty-one billion, sixty-one million, six hundred thirty-five thousand, five hundred fifty-one".