3781065648 has 40 divisors (see below), whose sum is σ = 9802303168. Its totient is φ = 1255897152.

The previous prime is 3781065643. The next prime is 3781065649. The reversal of 3781065648 is 8465601873.

It is a super-3 number, since 3×3781065648³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 3781065597 and 3781065606.

It is not an unprimeable number, because it can be changed into a prime (3781065641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125590 + ... + 152757.

Almost surely, 2^3781065648 is an apocalyptic number.

It is an amenable number.

3781065648 is an abundant number, since it is smaller than the sum of its proper divisors (6021237520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3781065648 is a wasteful number, since it uses less digits than its factorization.

3781065648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278641 (or 278635 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 3781065648 is about 61490.3703680503. The cubic root of 3781065648 is about 1557.8946022763.

The spelling of 3781065648 in words is "three billion, seven hundred eighty-one million, sixty-five thousand, six hundred forty-eight".