7155800065 has 16 divisors (see below), whose sum is σ = 8815359168. Its totient is φ = 5573244096.

The previous prime is 7155800063. The next prime is 7155800087. The reversal of 7155800065 is 5600085517.

It is a cyclic number.

It is not a de Polignac number, because 7155800065 - 2¹ = 7155800063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7155799997 and 7155800033.

It is not an unprimeable number, because it can be changed into a prime (7155800063) 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, 11799 + ... + 120211.

It is an arithmetic number, because the mean of its divisors is an integer number (550959948).

Almost surely, 2^7155800065 is an apocalyptic number.

It is an amenable number.

7155800065 is a deficient number, since it is larger than the sum of its proper divisors (1659559103).

7155800065 is a wasteful number, since it uses less digits than its factorization.

7155800065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108768.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 7155800065 is about 84591.9621772660. The cubic root of 7155800065 is about 1927.0193070104.

The spelling of 7155800065 in words is "seven billion, one hundred fifty-five million, eight hundred thousand, sixty-five".