1023643443553 has 8 divisors (see below), whose sum is σ = 1085444683488. Its totient is φ = 962018528064.

The previous prime is 1023643443551. The next prime is 1023643443631. The reversal of 1023643443553 is 3553443463201.

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 1023643443553 - 2¹ = 1023643443551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1023643443551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44069151 + ... + 44092372.

It is an arithmetic number, because the mean of its divisors is an integer number (135680585436).

Almost surely, 2^{1023643443553} is an apocalyptic number.

It is an amenable number.

1023643443553 is a deficient number, since it is larger than the sum of its proper divisors (61801239935).

1023643443553 is an equidigital number, since it uses as much as digits as its factorization.

1023643443553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88162223.

The product of its (nonzero) digits is 1555200, while the sum is 43.

The spelling of 1023643443553 in words is "one trillion, twenty-three billion, six hundred forty-three million, four hundred forty-three thousand, five hundred fifty-three".