3781657061 has 24 divisors (see below), whose sum is σ = 4688161344. Its totient is φ = 2986813440.

The previous prime is 3781657013. The next prime is 3781657063. The reversal of 3781657061 is 1607561873.

3781657061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3781657061 - 2¹⁰ = 3781656037 is a prime.

It is a super-2 number, since 2×3781657061² = 28601860254022315442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781657063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 755810 + ... + 760796.

It is an arithmetic number, because the mean of its divisors is an integer number (195340056).

Almost surely, 2^3781657061 is an apocalyptic number.

It is an amenable number.

3781657061 is a deficient number, since it is larger than the sum of its proper divisors (906504283).

3781657061 is a wasteful number, since it uses less digits than its factorization.

3781657061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661 (or 5648 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 3781657061 is about 61495.1791687771. The cubic root of 3781657061 is about 1557.9758237424.

The spelling of 3781657061 in words is "three billion, seven hundred eighty-one million, six hundred fifty-seven thousand, sixty-one".