7499999533 has 4 divisors (see below), whose sum is σ = 8076922588. Its totient is φ = 6923076480.

The previous prime is 7499999513. The next prime is 7499999557. The reversal of 7499999533 is 3359999947.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4942371204 + 2557628329 = 70302^2 + 50573^2 .

It is a cyclic number.

It is not a de Polignac number, because 7499999533 - 2¹³ = 7499991341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7499999513) 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, 288461508 + ... + 288461533.

It is an arithmetic number, because the mean of its divisors is an integer number (2019230647).

Almost surely, 2^7499999533 is an apocalyptic number.

It is an amenable number.

7499999533 is a deficient number, since it is larger than the sum of its proper divisors (576923055).

7499999533 is a wasteful number, since it uses less digits than its factorization.

7499999533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576923054.

The product of its digits is 74401740, while the sum is 67.

The square root of 7499999533 is about 86602.5376822181. The cubic root of 7499999533 is about 1957.4337799568.

The spelling of 7499999533 in words is "seven billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred thirty-three".