7945168521 has 8 divisors (see below), whose sum is σ = 10594061280. Its totient is φ = 5296527392.

The previous prime is 7945168519. The next prime is 7945168549. The reversal of 7945168521 is 1258615497.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7945168521 - 2¹ = 7945168519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7945160521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30646 + ... + 129728.

It is an arithmetic number, because the mean of its divisors is an integer number (1324257660).

Almost surely, 2^7945168521 is an apocalyptic number.

It is an amenable number.

7945168521 is a deficient number, since it is larger than the sum of its proper divisors (2648892759).

7945168521 is a wasteful number, since it uses less digits than its factorization.

7945168521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125815.

The product of its digits is 604800, while the sum is 48.

The square root of 7945168521 is about 89135.6747941025. The cubic root of 7945168521 is about 1995.4202309458.

The spelling of 7945168521 in words is "seven billion, nine hundred forty-five million, one hundred sixty-eight thousand, five hundred twenty-one".