4921614891 has 16 divisors (see below), whose sum is σ = 7292476800. Its totient is φ = 3280538664.

The previous prime is 4921614877. The next prime is 4921614941. The reversal of 4921614891 is 1984161294.

It is a happy number.

4921614891 is a `hidden beast` number, since 4 + 9 + 2 + 161 + 489 + 1 = 666.

It is not a de Polignac number, because 4921614891 - 2¹⁵ = 4921582123 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (4921614811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219880 + ... + 241226.

It is an arithmetic number, because the mean of its divisors is an integer number (455779800).

Almost surely, 2^4921614891 is an apocalyptic number.

4921614891 is a deficient number, since it is larger than the sum of its proper divisors (2370861909).

4921614891 is a wasteful number, since it uses less digits than its factorization.

4921614891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29895 (or 29889 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 4921614891 is about 70154.2221894021. Note that the first 3 decimals coincide. The cubic root of 4921614891 is about 1700.9930634980.

The spelling of 4921614891 in words is "four billion, nine hundred twenty-one million, six hundred fourteen thousand, eight hundred ninety-one".