31380566016 has 104 divisors (see below), whose sum is σ = 88593724944. Its totient is φ = 9844817920.

The previous prime is 31380565939. The next prime is 31380566057. The reversal of 31380566016 is 61066508313.

It is a super-2 number, since 2×31380566016² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133786 + ... + 284006.

Almost surely, 2^31380566016 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 31380566016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44296862472).

31380566016 is an abundant number, since it is smaller than the sum of its proper divisors (57213158928).

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

31380566016 is a wasteful number, since it uses less digits than its factorization.

31380566016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150265 (or 150243 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 31380566016 in words is "thirty-one billion, three hundred eighty million, five hundred sixty-six thousand, sixteen".