420061633523 has 4 divisors (see below), whose sum is σ = 480070438320. Its totient is φ = 360052828728.

The previous prime is 420061633517. The next prime is 420061633531. The reversal of 420061633523 is 325336160024.

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

It is a cyclic number.

It is not a de Polignac number, because 420061633523 - 2¹⁰ = 420061632499 is a prime.

It is a super-2 number, since 2×420061633523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420061633543) 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, 30004402388 + ... + 30004402401.

It is an arithmetic number, because the mean of its divisors is an integer number (120017609580).

Almost surely, 2^420061633523 is an apocalyptic number.

420061633523 is a deficient number, since it is larger than the sum of its proper divisors (60008804797).

420061633523 is an equidigital number, since it uses as much as digits as its factorization.

420061633523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60008804796.

The product of its (nonzero) digits is 77760, while the sum is 35.

Adding to 420061633523 its reverse (325336160024), we get a palindrome (745397793547).

The spelling of 420061633523 in words is "four hundred twenty billion, sixty-one million, six hundred thirty-three thousand, five hundred twenty-three".