123721617050 has 24 divisors (see below), whose sum is σ = 231135983136. Its totient is φ = 49270630640.

The previous prime is 123721617037. The next prime is 123721617079. The reversal of 123721617050 is 50716127321.

It is a self number, because there is not a number n which added to its sum of digits gives 123721617050.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5438942 + ... + 5461641.

It is an arithmetic number, because the mean of its divisors is an integer number (9630665964).

Almost surely, 2^123721617050 is an apocalyptic number.

123721617050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123721617050 is a deficient number, since it is larger than the sum of its proper divisors (107414366086).

123721617050 is a wasteful number, since it uses less digits than its factorization.

123721617050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900822 (or 10900817 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 123721617050 in words is "one hundred twenty-three billion, seven hundred twenty-one million, six hundred seventeen thousand, fifty".