65406500155 has 4 divisors (see below), whose sum is σ = 78487800192. Its totient is φ = 52325200120.

The previous prime is 65406500147. The next prime is 65406500167. The reversal of 65406500155 is 55100560456.

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

It is not a de Polignac number, because 65406500155 - 2³ = 65406500147 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, 6540650011 + ... + 6540650020.

It is an arithmetic number, because the mean of its divisors is an integer number (19621950048).

Almost surely, 2^65406500155 is an apocalyptic number.

65406500155 is a deficient number, since it is larger than the sum of its proper divisors (13081300037).

65406500155 is a wasteful number, since it uses less digits than its factorization.

65406500155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13081300036.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 65406500155 in words is "sixty-five billion, four hundred six million, five hundred thousand, one hundred fifty-five".