1011645263023 has 4 divisors (see below), whose sum is σ = 1012188867928. Its totient is φ = 1011101658120.

The previous prime is 1011645263017. The next prime is 1011645263047. The reversal of 1011645263023 is 3203625461101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011645263023 is a prime.

It is a super-2 number, since 2×1011645263023² (a number of 25 digits) 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 1011645263023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011645263063) 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, 271799661 + ... + 271803382.

It is an arithmetic number, because the mean of its divisors is an integer number (253047216982).

Almost surely, 2^{1011645263023} is an apocalyptic number.

1011645263023 is a deficient number, since it is larger than the sum of its proper divisors (543604905).

1011645263023 is an equidigital number, since it uses as much as digits as its factorization.

1011645263023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543604904.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 1011645263023 in words is "one trillion, eleven billion, six hundred forty-five million, two hundred sixty-three thousand, twenty-three".