6465920155 has 4 divisors (see below), whose sum is σ = 7759104192. Its totient is φ = 5172736120.

The previous prime is 6465920141. The next prime is 6465920179. The reversal of 6465920155 is 5510295646.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-6465920155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646592011 + ... + 646592020.

It is an arithmetic number, because the mean of its divisors is an integer number (1939776048).

Almost surely, 2^6465920155 is an apocalyptic number.

6465920155 is a deficient number, since it is larger than the sum of its proper divisors (1293184037).

6465920155 is a wasteful number, since it uses less digits than its factorization.

6465920155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293184036.

The product of its (nonzero) digits is 324000, while the sum is 43.

The square root of 6465920155 is about 80410.9454925136. The cubic root of 6465920155 is about 1862.9882357701.

The spelling of 6465920155 in words is "six billion, four hundred sixty-five million, nine hundred twenty thousand, one hundred fifty-five".