1002545723653 has 4 divisors (see below), whose sum is σ = 1029641554060. Its totient is φ = 975449893248.

The previous prime is 1002545723593. The next prime is 1002545723681. The reversal of 1002545723653 is 3563275452001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 760912523809 + 241633199844 = 872303^2 + 491562^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002545723653 - 2²⁵ = 1002512169221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002545723693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13547915148 + ... + 13547915221.

It is an arithmetic number, because the mean of its divisors is an integer number (257410388515).

Almost surely, 2^{1002545723653} is an apocalyptic number.

It is an amenable number.

1002545723653 is a deficient number, since it is larger than the sum of its proper divisors (27095830407).

1002545723653 is an equidigital number, since it uses as much as digits as its factorization.

1002545723653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27095830406.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 1002545723653 in words is "one trillion, two billion, five hundred forty-five million, seven hundred twenty-three thousand, six hundred fifty-three".