7705328399 has 16 divisors (see below), whose sum is σ = 8031985920. Its totient is φ = 7385568000.

The previous prime is 7705328383. The next prime is 7705328429. The reversal of 7705328399 is 9938235077.

It is a Cunningham number, because it is equal to 87780²-1.

It is a cyclic number.

It is not a de Polignac number, because 7705328399 - 2⁴ = 7705328383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7705328399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7705328359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3597869 + ... + 3600009.

It is an arithmetic number, because the mean of its divisors is an integer number (501999120).

Almost surely, 2^7705328399 is an apocalyptic number.

7705328399 is a deficient number, since it is larger than the sum of its proper divisors (326657521).

7705328399 is a wasteful number, since it uses less digits than its factorization.

7705328399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The square root of 7705328399 is about 87779.9999943039. Note that the first 5 decimals coincide. The cubic root of 7705328399 is about 1975.1362101432.

The spelling of 7705328399 in words is "seven billion, seven hundred five million, three hundred twenty-eight thousand, three hundred ninety-nine".