4921365851 has 4 divisors (see below), whose sum is σ = 4921651704. Its totient is φ = 4921080000.

The previous prime is 4921365797. The next prime is 4921365857. The reversal of 4921365851 is 1585631294.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4921365851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4921365857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115325 + ... + 152126.

It is an arithmetic number, because the mean of its divisors is an integer number (1230412926).

Almost surely, 2^4921365851 is an apocalyptic number.

4921365851 is a deficient number, since it is larger than the sum of its proper divisors (285853).

4921365851 is a wasteful number, since it uses less digits than its factorization.

4921365851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285852.

The product of its digits is 259200, while the sum is 44.

The square root of 4921365851 is about 70152.4472203215. The cubic root of 4921365851 is about 1700.9643722068.

The spelling of 4921365851 in words is "four billion, nine hundred twenty-one million, three hundred sixty-five thousand, eight hundred fifty-one".