4995996921 has 32 divisors (see below), whose sum is σ = 7647411200. Its totient is φ = 3220197120.

The previous prime is 4995996877. The next prime is 4995997033. The reversal of 4995996921 is 1296995994.

It is a happy number.

4995996921 is a `hidden beast` number, since 499 + 59 + 9 + 6 + 92 + 1 = 666.

It is not a de Polignac number, because 4995996921 - 2¹⁵ = 4995964153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4995956921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1193985 + ... + 1198161.

It is an arithmetic number, because the mean of its divisors is an integer number (238981600).

Almost surely, 2^4995996921 is an apocalyptic number.

It is an amenable number.

4995996921 is a deficient number, since it is larger than the sum of its proper divisors (2651414279).

4995996921 is a wasteful number, since it uses less digits than its factorization.

4995996921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646 (or 5640 counting only the distinct ones).

The product of its digits is 14171760, while the sum is 63.

The square root of 4995996921 is about 70682.3664077541. The cubic root of 4995996921 is about 1709.5194802501.

The spelling of 4995996921 in words is "four billion, nine hundred ninety-five million, nine hundred ninety-six thousand, nine hundred twenty-one".