1236670724645 has 18 divisors (see below), whose sum is σ = 1491704283186. Its totient is φ = 984230026080.

The previous prime is 1236670724621. The next prime is 1236670724687. The reversal of 1236670724645 is 5464270766321.

It can be written as a sum of positive squares in 3 ways, for example, as 662650564 + 1236008074081 = 25742^2 + 1111759^2 .

It is not a de Polignac number, because 1236670724645 - 2²⁰ = 1236669676069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 524678807 + ... + 524681163.

It is an arithmetic number, because the mean of its divisors is an integer number (82872460177).

Almost surely, 2^{1236670724645} is an apocalyptic number.

It is an amenable number.

1236670724645 is a deficient number, since it is larger than the sum of its proper divisors (255033558541).

1236670724645 is an frugal number, since it uses more digits than its factorization.

1236670724645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141 (or 2573 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 1236670724645 in words is "one trillion, two hundred thirty-six billion, six hundred seventy million, seven hundred twenty-four thousand, six hundred forty-five".