2781474445 has 8 divisors (see below), whose sum is σ = 3427979544. Its totient is φ = 2165039424.

The previous prime is 2781474427. The next prime is 2781474457. The reversal of 2781474445 is 5444741872.

It can be written as a sum of positive squares in 4 ways, for example, as 161467849 + 2620006596 = 12707^2 + 51186^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2781474445 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2781474395 and 2781474404.

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, 7517314 + ... + 7517683.

It is an arithmetic number, because the mean of its divisors is an integer number (428497443).

Almost surely, 2^2781474445 is an apocalyptic number.

It is an amenable number.

2781474445 is a deficient number, since it is larger than the sum of its proper divisors (646505099).

2781474445 is a wasteful number, since it uses less digits than its factorization.

2781474445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15035039.

The product of its digits is 1003520, while the sum is 46.

The square root of 2781474445 is about 52739.6856740728. The cubic root of 2781474445 is about 1406.3444103989.

The spelling of 2781474445 in words is "two billion, seven hundred eighty-one million, four hundred seventy-four thousand, four hundred forty-five".