31601450356540 has 24 divisors (see below), whose sum is σ = 66363258451392. Its totient is φ = 12640539627840.

The previous prime is 31601450356499. The next prime is 31601450356559. The reversal of 31601450356540 is 4565305410613.

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, 4315462 + ... + 9045778.

It is an arithmetic number, because the mean of its divisors is an integer number (2765135768808).

Almost surely, 2^{31601450356540} is an apocalyptic number.

It is an amenable number.

31601450356540 is an abundant number, since it is smaller than the sum of its proper divisors (34761808094852).

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

31601450356540 is a wasteful number, since it uses less digits than its factorization.

31601450356540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064357 (or 5064355 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 31601450356540 in words is "thirty-one trillion, six hundred one billion, four hundred fifty million, three hundred fifty-six thousand, five hundred forty".