7820871465 has 32 divisors (see below), whose sum is σ = 13660876800. Its totient is φ = 3789187520.

The previous prime is 7820871463. The next prime is 7820871481. The reversal of 7820871465 is 5641780287.

It is not a de Polignac number, because 7820871465 - 2¹ = 7820871463 is a prime.

It is a super-2 number, since 2×7820871465² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7820871463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220966 + ... + 253904.

It is an arithmetic number, because the mean of its divisors is an integer number (426902400).

Almost surely, 2^7820871465 is an apocalyptic number.

It is an amenable number.

7820871465 is a deficient number, since it is larger than the sum of its proper divisors (5840005335).

7820871465 is a wasteful number, since it uses less digits than its factorization.

7820871465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34397.

The product of its (nonzero) digits is 752640, while the sum is 48.

The square root of 7820871465 is about 88435.6911263773. The cubic root of 7820871465 is about 1984.9598018199.

The spelling of 7820871465 in words is "seven billion, eight hundred twenty million, eight hundred seventy-one thousand, four hundred sixty-five".