31603142645 has 8 divisors (see below), whose sum is σ = 38006758104. Its totient is φ = 25227189504.

The previous prime is 31603142639. The next prime is 31603142653. The reversal of 31603142645 is 54624130613.

It can be written as a sum of positive squares in 4 ways, for example, as 1585154596 + 30017988049 = 39814^2 + 173257^2 .

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 31603142645 - 2¹⁶ = 31603077109 is a prime.

It is a Duffinian number.

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, 6913064 + ... + 6917633.

It is an arithmetic number, because the mean of its divisors is an integer number (4750844763).

Almost surely, 2^31603142645 is an apocalyptic number.

It is an amenable number.

31603142645 is a deficient number, since it is larger than the sum of its proper divisors (6403615459).

31603142645 is a wasteful number, since it uses less digits than its factorization.

31603142645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13831159.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 31603142645 in words is "thirty-one billion, six hundred three million, one hundred forty-two thousand, six hundred forty-five".