1045643631 has 8 divisors (see below), whose sum is σ = 1396235520. Its totient is φ = 696073752.

The previous prime is 1045643629. The next prime is 1045643657. The reversal of 1045643631 is 1363465401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1045643631 - 2¹ = 1045643629 is a prime.

It is a super-2 number, since 2×1045643631² = 2186741206101728322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1045643592 and 1045643601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045643231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253111 + ... + 257208.

It is an arithmetic number, because the mean of its divisors is an integer number (174529440).

Almost surely, 2^1045643631 is an apocalyptic number.

1045643631 is a deficient number, since it is larger than the sum of its proper divisors (350591889).

1045643631 is an equidigital number, since it uses as much as digits as its factorization.

1045643631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511005.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 1045643631 is about 32336.4133910983. The cubic root of 1045643631 is about 1014.9887583182.

The spelling of 1045643631 in words is "one billion, forty-five million, six hundred forty-three thousand, six hundred thirty-one".