623645707711 has 4 divisors (see below), whose sum is σ = 671618454472. Its totient is φ = 575672960952.

The previous prime is 623645707709. The next prime is 623645707739. The reversal of 623645707711 is 117707546326.

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 623645707711 - 2¹ = 623645707709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623645707211) 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, 23986373361 + ... + 23986373386.

It is an arithmetic number, because the mean of its divisors is an integer number (167904613618).

Almost surely, 2^623645707711 is an apocalyptic number.

623645707711 is a deficient number, since it is larger than the sum of its proper divisors (47972746761).

623645707711 is a wasteful number, since it uses less digits than its factorization.

623645707711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47972746760.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 623645707711 in words is "six hundred twenty-three billion, six hundred forty-five million, seven hundred seven thousand, seven hundred eleven".