31403491985 has 8 divisors (see below), whose sum is σ = 37706380800. Its totient is φ = 25107999984.

The previous prime is 31403491969. The next prime is 31403491993. The reversal of 31403491985 is 58919430413.

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 31403491985 - 2⁴ = 31403491969 is a prime.

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, 1839857 + ... + 1856846.

It is an arithmetic number, because the mean of its divisors is an integer number (4713297600).

Almost surely, 2^31403491985 is an apocalyptic number.

It is an amenable number.

31403491985 is a deficient number, since it is larger than the sum of its proper divisors (6302888815).

31403491985 is a wasteful number, since it uses less digits than its factorization.

31403491985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3698407.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 31403491985 in words is "thirty-one billion, four hundred three million, four hundred ninety-one thousand, nine hundred eighty-five".