7800065045 has 18 divisors (see below), whose sum is σ = 9464792886. Its totient is φ = 6171011280.

The previous prime is 7800064999. The next prime is 7800065047. The reversal of 7800065045 is 5405600087.

It can be written as a sum of positive squares in only one way, i.e., 6240052036 + 1560013009 = 78994^2 + 39497^2 .

It is not a de Polignac number, because 7800065045 - 2²⁴ = 7783287829 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7800064996 and 7800065014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7800065047) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25080440 + ... + 25080750.

It is an arithmetic number, because the mean of its divisors is an integer number (525821827).

Almost surely, 2^7800065045 is an apocalyptic number.

It is an amenable number.

7800065045 is a deficient number, since it is larger than the sum of its proper divisors (1664727841).

7800065045 is an frugal number, since it uses more digits than its factorization.

7800065045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 7800065045 is about 88317.9769073092. The cubic root of 7800065045 is about 1983.1979953473.

The spelling of 7800065045 in words is "seven billion, eight hundred million, sixty-five thousand, forty-five".