165477464819 has 4 divisors (see below), whose sum is σ = 165503485560. Its totient is φ = 165451444080.

The previous prime is 165477464771. The next prime is 165477464821. The reversal of 165477464819 is 918464774561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918464774561 = 230663 ⋅3981847.

It is a cyclic number.

It is not a de Polignac number, because 165477464819 - 2⁸ = 165477464563 is a prime.

It is a super-2 number, since 2×165477464819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165477464839) 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, 13000829 + ... + 13013550.

It is an arithmetic number, because the mean of its divisors is an integer number (41375871390).

Almost surely, 2^165477464819 is an apocalyptic number.

165477464819 is a deficient number, since it is larger than the sum of its proper divisors (26020741).

165477464819 is an equidigital number, since it uses as much as digits as its factorization.

165477464819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26020740.

The product of its digits is 40642560, while the sum is 62.

The spelling of 165477464819 in words is "one hundred sixty-five billion, four hundred seventy-seven million, four hundred sixty-four thousand, eight hundred nineteen".