260421213163503 has 32 divisors (see below), whose sum is σ = 400521319672320. Its totient is φ = 147429078272640.

The previous prime is 260421213163499. The next prime is 260421213163603. The reversal of 260421213163503 is 305361312124062.

It is not a de Polignac number, because 260421213163503 - 2² = 260421213163499 is a prime.

It is a super-2 number, since 2×260421213163503² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260421213163603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12117001 + ... + 25839197.

It is an arithmetic number, because the mean of its divisors is an integer number (12516291239760).

Almost surely, 2^{260421213163503} is an apocalyptic number.

260421213163503 is a deficient number, since it is larger than the sum of its proper divisors (140100106508817).

260421213163503 is a wasteful number, since it uses less digits than its factorization.

260421213163503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13730607.

The product of its (nonzero) digits is 155520, while the sum is 39.

Adding to 260421213163503 its reverse (305361312124062), we get a palindrome (565782525287565).

The spelling of 260421213163503 in words is "two hundred sixty trillion, four hundred twenty-one billion, two hundred thirteen million, one hundred sixty-three thousand, five hundred three".