123651797809 has 8 divisors (see below), whose sum is σ = 124401852288. Its totient is φ = 122901858240.

The previous prime is 123651797803. The next prime is 123651797837. The reversal of 123651797809 is 908797156321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123651797809 - 2⁵ = 123651797777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123651797803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3270604 + ... + 3308194.

It is an arithmetic number, because the mean of its divisors is an integer number (15550231536).

Almost surely, 2^123651797809 is an apocalyptic number.

It is an amenable number.

123651797809 is a deficient number, since it is larger than the sum of its proper divisors (750054479).

123651797809 is a wasteful number, since it uses less digits than its factorization.

123651797809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57455.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 123651797809 in words is "one hundred twenty-three billion, six hundred fifty-one million, seven hundred ninety-seven thousand, eight hundred nine".