31534453643 has 16 divisors (see below), whose sum is σ = 39325893120. Its totient is φ = 24565920000.

The previous prime is 31534453633. The next prime is 31534453673. The reversal of 31534453643 is 34635443513.

It is a cyclic number.

It is not a de Polignac number, because 31534453643 - 2¹⁶ = 31534388107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31534453643.

It is not an unprimeable number, because it can be changed into a prime (31534453633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256898 + ... + 359256.

It is an arithmetic number, because the mean of its divisors is an integer number (2457868320).

Almost surely, 2^31534453643 is an apocalyptic number.

31534453643 is a deficient number, since it is larger than the sum of its proper divisors (7791439477).

31534453643 is a wasteful number, since it uses less digits than its factorization.

31534453643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106378.

The product of its digits is 777600, while the sum is 41.

The spelling of 31534453643 in words is "thirty-one billion, five hundred thirty-four million, four hundred fifty-three thousand, six hundred forty-three".