7800340861 has 4 divisors (see below), whose sum is σ = 7835320192. Its totient is φ = 7765361532.

The previous prime is 7800340813. The next prime is 7800340909. The reversal of 7800340861 is 1680430087.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (7800340813) and next prime (7800340909).

It is a cyclic number.

It is not a de Polignac number, because 7800340861 - 2¹¹ = 7800338813 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 7800340861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7800347861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17489331 + ... + 17489776.

It is an arithmetic number, because the mean of its divisors is an integer number (1958830048).

Almost surely, 2^7800340861 is an apocalyptic number.

It is an amenable number.

7800340861 is a deficient number, since it is larger than the sum of its proper divisors (34979331).

7800340861 is a wasteful number, since it uses less digits than its factorization.

7800340861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34979330.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 7800340861 is about 88319.5383876071. The cubic root of 7800340861 is about 1983.2213708486.

The spelling of 7800340861 in words is "seven billion, eight hundred million, three hundred forty thousand, eight hundred sixty-one".