7991505445 has 16 divisors (see below), whose sum is σ = 11956123008. Its totient is φ = 4981717440.

The previous prime is 7991505439. The next prime is 7991505461. The reversal of 7991505445 is 5445051997.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-7991505445 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10378194 + ... + 10378963.

It is an arithmetic number, because the mean of its divisors is an integer number (747257688).

Almost surely, 2^7991505445 is an apocalyptic number.

It is an amenable number.

7991505445 is a deficient number, since it is larger than the sum of its proper divisors (3964617563).

7991505445 is a wasteful number, since it uses less digits than its factorization.

7991505445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20757180.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The square root of 7991505445 is about 89395.2204818580. The cubic root of 7991505445 is about 1999.2918697220.

The spelling of 7991505445 in words is "seven billion, nine hundred ninety-one million, five hundred five thousand, four hundred forty-five".