623620511101 has 4 divisors (see below), whose sum is σ = 712709155552. Its totient is φ = 534531866652.

The previous prime is 623620511099. The next prime is 623620511131. The reversal of 623620511101 is 101115026326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 623620511101 - 2¹ = 623620511099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 623620511101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623620511131) 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, 44544322215 + ... + 44544322228.

It is an arithmetic number, because the mean of its divisors is an integer number (178177288888).

Almost surely, 2^623620511101 is an apocalyptic number.

It is an amenable number.

623620511101 is a deficient number, since it is larger than the sum of its proper divisors (89088644451).

623620511101 is an equidigital number, since it uses as much as digits as its factorization.

623620511101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89088644450.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 623620511101 its reverse (101115026326), we get a palindrome (724735537427).

The spelling of 623620511101 in words is "six hundred twenty-three billion, six hundred twenty million, five hundred eleven thousand, one hundred one".