2045620783505 has 8 divisors (see below), whose sum is σ = 2643571474152. Its totient is φ = 1510612270848.

The previous prime is 2045620783471. The next prime is 2045620783543. The reversal of 2045620783505 is 5053870265402.

It is a Cunningham number, because it is equal to 1430252²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 302605609216 + 1743015174289 = 550096^2 + 1320233^2 .

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 2045620783505 - 2⁶ = 2045620783441 is a prime.

It is a super-2 number, since 2×2045620783505² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2045620783505.

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, 15735544424 + ... + 15735544553.

It is an arithmetic number, because the mean of its divisors is an integer number (330446434269).

Almost surely, 2^{2045620783505} is an apocalyptic number.

It is an amenable number.

2045620783505 is a deficient number, since it is larger than the sum of its proper divisors (597950690647).

2045620783505 is a wasteful number, since it uses less digits than its factorization.

2045620783505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31471088995.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 2045620783505 in words is "two trillion, forty-five billion, six hundred twenty million, seven hundred eighty-three thousand, five hundred five".