1453564643 has 4 divisors (see below), whose sum is σ = 1469896920. Its totient is φ = 1437232368.

The previous prime is 1453564633. The next prime is 1453564681. The reversal of 1453564643 is 3464653541.

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 1453564643 - 2⁶ = 1453564579 is a prime.

It is a super-2 number, since 2×1453564643² = 4225700342759434898, which contains 22 as substring.

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 1453564643.

It is not an unprimeable number, because it can be changed into a prime (1453564613) 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, 8166005 + ... + 8166182.

It is an arithmetic number, because the mean of its divisors is an integer number (367474230).

Almost surely, 2^1453564643 is an apocalyptic number.

1453564643 is a deficient number, since it is larger than the sum of its proper divisors (16332277).

1453564643 is an equidigital number, since it uses as much as digits as its factorization.

1453564643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16332276.

The product of its digits is 518400, while the sum is 41.

The square root of 1453564643 is about 38125.6428535966. The cubic root of 1453564643 is about 1132.7779416475. Note that the first 3 decimals are identical.

The spelling of 1453564643 in words is "one billion, four hundred fifty-three million, five hundred sixty-four thousand, six hundred forty-three".