501420210455623 has 4 divisors (see below), whose sum is σ = 501420446617968. Its totient is φ = 501419974293280.

The previous prime is 501420210455599. The next prime is 501420210455627. The reversal of 501420210455623 is 326554012024105.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501420210455623 is a prime.

It is a super-2 number, since 2×501420210455623² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501420210455627) 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, 114867211 + ... + 119152492.

It is an arithmetic number, because the mean of its divisors is an integer number (125355111654492).

Almost surely, 2^{501420210455623} is an apocalyptic number.

501420210455623 is a deficient number, since it is larger than the sum of its proper divisors (236162345).

501420210455623 is a wasteful number, since it uses less digits than its factorization.

501420210455623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236162344.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 501420210455623 its reverse (326554012024105), we get a palindrome (827974222479728).

The spelling of 501420210455623 in words is "five hundred one trillion, four hundred twenty billion, two hundred ten million, four hundred fifty-five thousand, six hundred twenty-three".