7081845749 has 4 divisors (see below), whose sum is σ = 7725649920. Its totient is φ = 6438041580.

The previous prime is 7081845739. The next prime is 7081845761. The reversal of 7081845749 is 9475481807.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7081845749 - 2²⁴ = 7065068533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7081845749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7081845709) 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, 321902069 + ... + 321902090.

It is an arithmetic number, because the mean of its divisors is an integer number (1931412480).

Almost surely, 2^7081845749 is an apocalyptic number.

It is an amenable number.

7081845749 is a deficient number, since it is larger than the sum of its proper divisors (643804171).

7081845749 is a wasteful number, since it uses less digits than its factorization.

7081845749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643804170.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The square root of 7081845749 is about 84153.7031211342. The cubic root of 7081845749 is about 1920.3578026931.

The spelling of 7081845749 in words is "seven billion, eighty-one million, eight hundred forty-five thousand, seven hundred forty-nine".