31445686067513 has 8 divisors (see below), whose sum is σ = 31469945673408. Its totient is φ = 31421428439184.

The previous prime is 31445686067443. The next prime is 31445686067527. The reversal of 31445686067513 is 31576068654413.

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

It is a cyclic number.

It is not a de Polignac number, because 31445686067513 - 2²² = 31445681873209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31445686060513) 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, 32150270 + ... + 33113912.

It is an arithmetic number, because the mean of its divisors is an integer number (3933743209176).

Almost surely, 2^{31445686067513} is an apocalyptic number.

It is an amenable number.

31445686067513 is a deficient number, since it is larger than the sum of its proper divisors (24259605895).

31445686067513 is a wasteful number, since it uses less digits than its factorization.

31445686067513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988783.

The product of its (nonzero) digits is 43545600, while the sum is 59.

The spelling of 31445686067513 in words is "thirty-one trillion, four hundred forty-five billion, six hundred eighty-six million, sixty-seven thousand, five hundred thirteen".