7641924121 has 8 divisors (see below), whose sum is σ = 8271542664. Its totient is φ = 7018273920.

The previous prime is 7641924097. The next prime is 7641924139. The reversal of 7641924121 is 1214291467.

It can be written as a sum of positive squares in 4 ways, for example, as 1327873600 + 6314050521 = 36440^2 + 79461^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7641924121 - 2⁹ = 7641923609 is a prime.

It is a super-2 number, since 2×7641924121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7641924151) 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 7 ways as a sum of consecutive naturals, for example, 1489420 + ... + 1494541.

It is an arithmetic number, because the mean of its divisors is an integer number (1033942833).

Almost surely, 2^7641924121 is an apocalyptic number.

It is an amenable number.

7641924121 is a deficient number, since it is larger than the sum of its proper divisors (629618543).

7641924121 is a wasteful number, since it uses less digits than its factorization.

7641924121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2984171.

The product of its digits is 24192, while the sum is 37.

The square root of 7641924121 is about 87418.0995046220. The cubic root of 7641924121 is about 1969.7037287112.

The spelling of 7641924121 in words is "seven billion, six hundred forty-one million, nine hundred twenty-four thousand, one hundred twenty-one".