3780125991 has 12 divisors (see below), whose sum is σ = 5493682168. Its totient is φ = 2504622384.

The previous prime is 3780125971. The next prime is 3780126037. The reversal of 3780125991 is 1995210873.

It is not a de Polignac number, because 3780125991 - 2¹⁴ = 3780109607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3780125941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1286920 + ... + 1289853.

Almost surely, 2^3780125991 is an apocalyptic number.

3780125991 is a deficient number, since it is larger than the sum of its proper divisors (1713556177).

3780125991 is a wasteful number, since it uses less digits than its factorization.

3780125991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576942 (or 2576939 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 3780125991 is about 61482.7292091039. The cubic root of 3780125991 is about 1557.7655374404.

The spelling of 3780125991 in words is "three billion, seven hundred eighty million, one hundred twenty-five thousand, nine hundred ninety-one".