31361566144636 has 192 divisors, whose sum is σ = 72759450597120. Its totient is φ = 11475972587520.

The previous prime is 31361566144633. The next prime is 31361566144661. The reversal of 31361566144636 is 63644166516313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31361566144631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 126810910 + ... + 127057978.

It is an arithmetic number, because the mean of its divisors is an integer number (378955471860).

Almost surely, 2^{31361566144636} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31361566144636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36379725298560).

31361566144636 is an abundant number, since it is smaller than the sum of its proper divisors (41397884452484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31361566144636 is a wasteful number, since it uses less digits than its factorization.

31361566144636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247464 (or 247462 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 55.

The spelling of 31361566144636 in words is "thirty-one trillion, three hundred sixty-one billion, five hundred sixty-six million, one hundred forty-four thousand, six hundred thirty-six".