3778891265 has 16 divisors (see below), whose sum is σ = 4583831040. Its totient is φ = 2990395200.

The previous prime is 3778891253. The next prime is 3778891271. The reversal of 3778891265 is 5621988773.

It is not a de Polignac number, because 3778891265 - 2³⁰ = 2705149441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3778891265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667316 + ... + 672954.

It is an arithmetic number, because the mean of its divisors is an integer number (286489440).

Almost surely, 2^3778891265 is an apocalyptic number.

It is an amenable number.

3778891265 is a deficient number, since it is larger than the sum of its proper divisors (804939775).

3778891265 is a wasteful number, since it uses less digits than its factorization.

3778891265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7072.

The product of its digits is 5080320, while the sum is 56.

The square root of 3778891265 is about 61472.6871464067. The cubic root of 3778891265 is about 1557.5959114304.

The spelling of 3778891265 in words is "three billion, seven hundred seventy-eight million, eight hundred ninety-one thousand, two hundred sixty-five".