4537866921 has 48 divisors (see below), whose sum is σ = 7328780928. Its totient is φ = 2488147200.

The previous prime is 4537866913. The next prime is 4537866929. The reversal of 4537866921 is 1296687354.

It is an interprime number because it is at equal distance from previous prime (4537866913) and next prime (4537866929).

It is not a de Polignac number, because 4537866921 - 2³ = 4537866913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4537866929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 361476 + ... + 373818.

It is an arithmetic number, because the mean of its divisors is an integer number (152682936).

Almost surely, 2^4537866921 is an apocalyptic number.

4537866921 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4537866921 is a deficient number, since it is larger than the sum of its proper divisors (2790914007).

4537866921 is a wasteful number, since it uses less digits than its factorization.

4537866921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12462 (or 12455 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 4537866921 is about 67363.6914145892. The cubic root of 4537866921 is about 1655.5815775661.

The spelling of 4537866921 in words is "four billion, five hundred thirty-seven million, eight hundred sixty-six thousand, nine hundred twenty-one".