206426164503 has 32 divisors (see below), whose sum is σ = 314567741376. Its totient is φ = 119282761728.

The previous prime is 206426164493. The next prime is 206426164561. The reversal of 206426164503 is 305461624602.

It is not a de Polignac number, because 206426164503 - 2⁹ = 206426163991 is a prime.

It is a super-2 number, since 2×206426164503² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206426164003) 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, 72450 + ... + 646607.

It is an arithmetic number, because the mean of its divisors is an integer number (9830241918).

Almost surely, 2^206426164503 is an apocalyptic number.

206426164503 is a deficient number, since it is larger than the sum of its proper divisors (108141576873).

206426164503 is a wasteful number, since it uses less digits than its factorization.

206426164503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719523.

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 206426164503 in words is "two hundred six billion, four hundred twenty-six million, one hundred sixty-four thousand, five hundred three".