31642091649803 has 4 divisors (see below), whose sum is σ = 32315327642400. Its totient is φ = 30968855657208.

The previous prime is 31642091649799. The next prime is 31642091649823. The reversal of 31642091649803 is 30894619024613.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31642091649803 - 2² = 31642091649799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31642091649823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336617996228 + ... + 336617996321.

It is an arithmetic number, because the mean of its divisors is an integer number (8078831910600).

Almost surely, 2^{31642091649803} is an apocalyptic number.

31642091649803 is a deficient number, since it is larger than the sum of its proper divisors (673235992597).

31642091649803 is an equidigital number, since it uses as much as digits as its factorization.

31642091649803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673235992596.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 31642091649803 in words is "thirty-one trillion, six hundred forty-two billion, ninety-one million, six hundred forty-nine thousand, eight hundred three".