3778134561 has 24 divisors (see below), whose sum is σ = 5576269920. Its totient is φ = 2464257600.

The previous prime is 3778134559. The next prime is 3778134571. The reversal of 3778134561 is 1654318773.

3778134561 is a `hidden beast` number, since 3 + 7 + 7 + 81 + 3 + 4 + 561 = 666.

It is not a de Polignac number, because 3778134561 - 2¹ = 3778134559 is a prime.

It is a super-2 number, since 2×3778134561² = 28548601522045325442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3778134511) 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, 95181 + ... + 128901.

It is an arithmetic number, because the mean of its divisors is an integer number (232344580).

Almost surely, 2^3778134561 is an apocalyptic number.

It is an amenable number.

3778134561 is a deficient number, since it is larger than the sum of its proper divisors (1798135359).

3778134561 is a wasteful number, since it uses less digits than its factorization.

3778134561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33997 (or 33994 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 3778134561 is about 61466.5320398020. The cubic root of 3778134561 is about 1557.4919375701.

The spelling of 3778134561 in words is "three billion, seven hundred seventy-eight million, one hundred thirty-four thousand, five hundred sixty-one".