7820140799 has 4 divisors (see below), whose sum is σ = 7891885320. Its totient is φ = 7748396280.

The previous prime is 7820140787. The next prime is 7820140807. The reversal of 7820140799 is 9970410287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9970410287 = 769 ⋅12965423.

It is a cyclic number.

It is not a de Polignac number, because 7820140799 - 2²⁴ = 7803363583 is a prime.

It is a super-2 number, since 2×7820140799² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820140739) 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, 35872097 + ... + 35872314.

It is an arithmetic number, because the mean of its divisors is an integer number (1972971330).

Almost surely, 2^7820140799 is an apocalyptic number.

7820140799 is a deficient number, since it is larger than the sum of its proper divisors (71744521).

7820140799 is a wasteful number, since it uses less digits than its factorization.

7820140799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71744520.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 7820140799 is about 88431.5599715396. The cubic root of 7820140799 is about 1984.8979848466.

The spelling of 7820140799 in words is "seven billion, eight hundred twenty million, one hundred forty thousand, seven hundred ninety-nine".