7938645699 has 8 divisors (see below), whose sum is σ = 10588776192. Its totient is φ = 5290472840.

The previous prime is 7938645691. The next prime is 7938645709. The reversal of 7938645699 is 9965468397.

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 7938645699 - 2³ = 7938645691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7938645691) 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, 479919 + ... + 496184.

It is an arithmetic number, because the mean of its divisors is an integer number (1323597024).

Almost surely, 2^7938645699 is an apocalyptic number.

7938645699 is a deficient number, since it is larger than the sum of its proper divisors (2650130493).

7938645699 is a wasteful number, since it uses less digits than its factorization.

7938645699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978817.

The product of its digits is 88179840, while the sum is 66.

The square root of 7938645699 is about 89099.0779918625. The cubic root of 7938645699 is about 1994.8740149460.

The spelling of 7938645699 in words is "seven billion, nine hundred thirty-eight million, six hundred forty-five thousand, six hundred ninety-nine".