23162720646 has 128 divisors (see below), whose sum is σ = 52642275840. Its totient is φ = 6746342400.

The previous prime is 23162720569. The next prime is 23162720671. The reversal of 23162720646 is 64602726132.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24614536 + ... + 24615476.

It is an arithmetic number, because the mean of its divisors is an integer number (411267780).

Almost surely, 2^23162720646 is an apocalyptic number.

23162720646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 23162720646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26321137920).

23162720646 is an abundant number, since it is smaller than the sum of its proper divisors (29479555194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23162720646 is a wasteful number, since it uses less digits than its factorization.

23162720646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 23162720646 in words is "twenty-three billion, one hundred sixty-two million, seven hundred twenty thousand, six hundred forty-six".