2145340243045 has 8 divisors (see below), whose sum is σ = 2725844073624. Its totient is φ = 1615315006464.

The previous prime is 2145340243019. The next prime is 2145340243051. The reversal of 2145340243045 is 5403420435412.

It can be written as a sum of positive squares in 4 ways, for example, as 1015011920484 + 1130328322561 = 1007478^2 + 1063169^2 .

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

It is not a de Polignac number, because 2145340243045 - 2²¹ = 2145338145893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145340242995 and 2145340243013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12619648404 + ... + 12619648573.

It is an arithmetic number, because the mean of its divisors is an integer number (340730509203).

Almost surely, 2^{2145340243045} is an apocalyptic number.

It is an amenable number.

2145340243045 is a deficient number, since it is larger than the sum of its proper divisors (580503830579).

2145340243045 is a wasteful number, since it uses less digits than its factorization.

2145340243045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25239296999.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 2145340243045 its reverse (5403420435412), we get a palindrome (7548760678457).

The spelling of 2145340243045 in words is "two trillion, one hundred forty-five billion, three hundred forty million, two hundred forty-three thousand, forty-five".