7533993994 has 8 divisors (see below), whose sum is σ = 11302754148. Its totient is φ = 3766409280.

The previous prime is 7533993931. The next prime is 7533993997. The reversal of 7533993994 is 4993993357.

It can be written as a sum of positive squares in 2 ways, for example, as 5040290025 + 2493703969 = 70995^2 + 49937^2 .

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

It is a super-2 number, since 2×7533993994² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7533993997) 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, 277657 + ... + 303580.

Almost surely, 2^7533993994 is an apocalyptic number.

7533993994 is a deficient number, since it is larger than the sum of its proper divisors (3768760154).

7533993994 is a wasteful number, since it uses less digits than its factorization.

7533993994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587720.

The product of its digits is 24800580, while the sum is 61.

The square root of 7533993994 is about 86798.5829031788. The cubic root of 7533993994 is about 1960.3867411563.

The spelling of 7533993994 in words is "seven billion, five hundred thirty-three million, nine hundred ninety-three thousand, nine hundred ninety-four".