2149151945 has 8 divisors (see below), whose sum is σ = 2611628160. Its totient is φ = 1697557680.

The previous prime is 2149151933. The next prime is 2149151971. The reversal of 2149151945 is 5491519412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2149151945 - 2⁴ = 2149151929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720051 + ... + 2720840.

It is an arithmetic number, because the mean of its divisors is an integer number (326453520).

Almost surely, 2^2149151945 is an apocalyptic number.

It is an amenable number.

2149151945 is a deficient number, since it is larger than the sum of its proper divisors (462476215).

2149151945 is an equidigital number, since it uses as much as digits as its factorization.

2149151945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440975.

The product of its digits is 64800, while the sum is 41.

The square root of 2149151945 is about 46358.9467632732. The cubic root of 2149151945 is about 1290.4931602005.

The spelling of 2149151945 in words is "two billion, one hundred forty-nine million, one hundred fifty-one thousand, nine hundred forty-five".