7490079521 has 16 divisors (see below), whose sum is σ = 7965896400. Its totient is φ = 7018260480.

The previous prime is 7490079511. The next prime is 7490079523. The reversal of 7490079521 is 1259700947.

It can be written as a sum of positive squares in 8 ways, for example, as 802928896 + 6687150625 = 28336^2 + 81775^2 .

It is a cyclic number.

It is not a de Polignac number, because 7490079521 - 2²⁶ = 7422970657 is a prime.

It is a super-2 number, since 2×7490079521² (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 (7490079523) 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 15 ways as a sum of consecutive naturals, for example, 4834655 + ... + 4836203.

It is an arithmetic number, because the mean of its divisors is an integer number (497868525).

Almost surely, 2^7490079521 is an apocalyptic number.

It is an amenable number.

7490079521 is a deficient number, since it is larger than the sum of its proper divisors (475816879).

7490079521 is a wasteful number, since it uses less digits than its factorization.

7490079521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 7490079521 is about 86545.2455135463. The cubic root of 7490079521 is about 1956.5703872821.

The spelling of 7490079521 in words is "seven billion, four hundred ninety million, seventy-nine thousand, five hundred twenty-one".