1631534645 has 16 divisors (see below), whose sum is σ = 2121393792. Its totient is φ = 1197426240.

The previous prime is 1631534627. The next prime is 1631534651. The reversal of 1631534645 is 5464351361.

It is not a de Polignac number, because 1631534645 - 2⁶ = 1631534581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1631534599 and 1631534608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66401 + ... + 87590.

It is an arithmetic number, because the mean of its divisors is an integer number (132587112).

Almost surely, 2^1631534645 is an apocalyptic number.

It is an amenable number.

1631534645 is a deficient number, since it is larger than the sum of its proper divisors (489859147).

1631534645 is a wasteful number, since it uses less digits than its factorization.

1631534645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154172.

The product of its digits is 129600, while the sum is 38.

The square root of 1631534645 is about 40392.2597164358. The cubic root of 1631534645 is about 1177.2411476866.

The spelling of 1631534645 in words is "one billion, six hundred thirty-one million, five hundred thirty-four thousand, six hundred forty-five".