2781628745 has 32 divisors (see below), whose sum is σ = 3865107456. Its totient is φ = 1882368000.

The previous prime is 2781628739. The next prime is 2781628753. The reversal of 2781628745 is 5478261872.

It is not a de Polignac number, because 2781628745 - 2¹² = 2781624649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2781628693 and 2781628702.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1462295 + ... + 1464195.

It is an arithmetic number, because the mean of its divisors is an integer number (120784608).

Almost surely, 2^2781628745 is an apocalyptic number.

It is an amenable number.

2781628745 is a deficient number, since it is larger than the sum of its proper divisors (1083478711).

2781628745 is a wasteful number, since it uses less digits than its factorization.

2781628745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441.

The product of its digits is 1505280, while the sum is 50.

The square root of 2781628745 is about 52741.1484990610. The cubic root of 2781628745 is about 1406.3704151834.

The spelling of 2781628745 in words is "two billion, seven hundred eighty-one million, six hundred twenty-eight thousand, seven hundred forty-five".