7536149721 has 27 divisors (see below), whose sum is σ = 11496175509. Its totient is φ = 4756548312.

The previous prime is 7536149713. The next prime is 7536149729. The reversal of 7536149721 is 1279416357.

The square root of 7536149721 is 86811.

It is a perfect power (a square), and thus also a powerful number.

7536149721 is a `hidden beast` number, since 7 + 5 + 3 + 614 + 9 + 7 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (7536149713) and next prime (7536149729).

It is not a de Polignac number, because 7536149721 - 2³ = 7536149713 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7536149729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4947466 + ... + 4948988.

Almost surely, 2^7536149721 is an apocalyptic number.

7536149721 is the 86811-st square number.

7536149721 is the 43406-th centered octagonal number.

It is an amenable number.

7536149721 is a deficient number, since it is larger than the sum of its proper divisors (3960025788).

7536149721 is an equidigital number, since it uses as much as digits as its factorization.

7536149721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090 (or 1545 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The cubic root of 7536149721 is about 1960.5737006727.

The spelling of 7536149721 in words is "seven billion, five hundred thirty-six million, one hundred forty-nine thousand, seven hundred twenty-one".