3909181545 has 48 divisors (see below), whose sum is σ = 7170239232. Its totient is φ = 1966124160.

The previous prime is 3909181541. The next prime is 3909181547. The reversal of 3909181545 is 5451819093.

3909181545 is a `hidden beast` number, since 3 + 90 + 9 + 18 + 1 + 545 = 666.

It is not a de Polignac number, because 3909181545 - 2² = 3909181541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3909181545.

It is not an unprimeable number, because it can be changed into a prime (3909181541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46887 + ... + 100083.

It is an arithmetic number, because the mean of its divisors is an integer number (149379984).

Almost surely, 2^3909181545 is an apocalyptic number.

It is an amenable number.

3909181545 is a deficient number, since it is larger than the sum of its proper divisors (3261057687).

3909181545 is a wasteful number, since it uses less digits than its factorization.

3909181545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53302 (or 53299 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 3909181545 is about 62523.4479615448. The cubic root of 3909181545 is about 1575.2951888139.

The spelling of 3909181545 in words is "three billion, nine hundred nine million, one hundred eighty-one thousand, five hundred forty-five".