1623123642 has 48 divisors (see below), whose sum is σ = 3766633920. Its totient is φ = 456774912.

The previous prime is 1623123629. The next prime is 1623123643. The reversal of 1623123642 is 2463213261.

It is not an unprimeable number, because it can be changed into a prime (1623123643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184234 + ... + 192842.

It is an arithmetic number, because the mean of its divisors is an integer number (78471540).

Almost surely, 2^1623123642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1623123642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1883316960).

1623123642 is an abundant number, since it is smaller than the sum of its proper divisors (2143510278).

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

1623123642 is an equidigital number, since it uses as much as digits as its factorization.

1623123642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8755 (or 8688 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 1623123642 is about 40288.0086626281. The cubic root of 1623123642 is about 1175.2146623349.

The spelling of 1623123642 in words is "one billion, six hundred twenty-three million, one hundred twenty-three thousand, six hundred forty-two".