7800120145 has 8 divisors (see below), whose sum is σ = 9362632104. Its totient is φ = 6238437504.

The previous prime is 7800120143. The next prime is 7800120151. The reversal of 7800120145 is 5410210087.

7800120145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 244859904 + 7555260241 = 15648^2 + 86921^2 .

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 7800120145 - 2¹ = 7800120143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7800120143) 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, 186444 + ... + 224413.

It is an arithmetic number, because the mean of its divisors is an integer number (1170329013).

Almost surely, 2^7800120145 is an apocalyptic number.

It is an amenable number.

7800120145 is a deficient number, since it is larger than the sum of its proper divisors (1562511959).

7800120145 is a wasteful number, since it uses less digits than its factorization.

7800120145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414659.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 7800120145 is about 88318.2888477806. The cubic root of 7800120145 is about 1983.2026651354.

The spelling of 7800120145 in words is "seven billion, eight hundred million, one hundred twenty thousand, one hundred forty-five".