123659916990 has 32 divisors (see below), whose sum is σ = 309687446016. Its totient is φ = 31542239520.

The previous prime is 123659916983. The next prime is 123659916997. The reversal of 123659916990 is 99619956321.

It is an interprime number because it is at equal distance from previous prime (123659916983) and next prime (123659916997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123659916997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89607946 + ... + 89609325.

It is an arithmetic number, because the mean of its divisors is an integer number (9677732688).

Almost surely, 2^123659916990 is an apocalyptic number.

123659916990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123659916990 is an abundant number, since it is smaller than the sum of its proper divisors (186027529026).

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

123659916990 is a wasteful number, since it uses less digits than its factorization.

123659916990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179217304.

The product of its (nonzero) digits is 7085880, while the sum is 60.

The spelling of 123659916990 in words is "one hundred twenty-three billion, six hundred fifty-nine million, nine hundred sixteen thousand, nine hundred ninety".