4149957921 has 8 divisors (see below), whose sum is σ = 5568521664. Its totient is φ = 2749016400.

The previous prime is 4149957869. The next prime is 4149957937. The reversal of 4149957921 is 1297599414.

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

It is not a de Polignac number, because 4149957921 - 2⁶ = 4149957857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4149957991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4405005 + ... + 4405946.

It is an arithmetic number, because the mean of its divisors is an integer number (696065208).

Almost surely, 2^4149957921 is an apocalyptic number.

It is an amenable number.

4149957921 is a deficient number, since it is larger than the sum of its proper divisors (1418563743).

4149957921 is a wasteful number, since it uses less digits than its factorization.

4149957921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8811111.

The product of its digits is 816480, while the sum is 51.

The square root of 4149957921 is about 64420.1670364180. The cubic root of 4149957921 is about 1606.9951438714.

The spelling of 4149957921 in words is "four billion, one hundred forty-nine million, nine hundred fifty-seven thousand, nine hundred twenty-one".