4921143645 has 16 divisors (see below), whose sum is σ = 8589632832. Its totient is φ = 2386008960.

The previous prime is 4921143599. The next prime is 4921143673. The reversal of 4921143645 is 5463411294.

It is not a de Polignac number, because 4921143645 - 2⁶ = 4921143581 is a prime.

It is a congruent number.

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, 14912392 + ... + 14912721.

It is an arithmetic number, because the mean of its divisors is an integer number (536852052).

Almost surely, 2^4921143645 is an apocalyptic number.

It is an amenable number.

4921143645 is a deficient number, since it is larger than the sum of its proper divisors (3668489187).

4921143645 is a wasteful number, since it uses less digits than its factorization.

4921143645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29825132.

The product of its digits is 103680, while the sum is 39.

The square root of 4921143645 is about 70150.8634658192. The cubic root of 4921143645 is about 1700.9387715782.

The spelling of 4921143645 in words is "four billion, nine hundred twenty-one million, one hundred forty-three thousand, six hundred forty-five".