7453949081 has 4 divisors (see below), whose sum is σ = 7892416692. Its totient is φ = 7015481472.

The previous prime is 7453948963. The next prime is 7453949143. The reversal of 7453949081 is 1809493547.

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 6250483600 + 1203465481 = 79060^2 + 34691^2 .

It is a cyclic number.

It is not a de Polignac number, because 7453949081 - 2¹⁴ = 7453932697 is a prime.

It is a super-2 number, since 2×7453949081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7453946081) 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 3 ways as a sum of consecutive naturals, for example, 219233780 + ... + 219233813.

It is an arithmetic number, because the mean of its divisors is an integer number (1973104173).

Almost surely, 2^7453949081 is an apocalyptic number.

It is an amenable number.

7453949081 is a deficient number, since it is larger than the sum of its proper divisors (438467611).

7453949081 is a wasteful number, since it uses less digits than its factorization.

7453949081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438467610.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 7453949081 is about 86336.2558894003. The cubic root of 7453949081 is about 1953.4192982826.

The spelling of 7453949081 in words is "seven billion, four hundred fifty-three million, nine hundred forty-nine thousand, eighty-one".