124638645659 has 4 divisors (see below), whose sum is σ = 135969431640. Its totient is φ = 113307859680.

The previous prime is 124638645641. The next prime is 124638645671. The reversal of 124638645659 is 956546836421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956546836421 = 11 ⋅86958803311.

It is a cyclic number.

It is not a de Polignac number, because 124638645659 - 2⁸ = 124638645403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124638645598 and 124638645607.

It is not an unprimeable number, because it can be changed into a prime (124638645959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5665392974 + ... + 5665392995.

It is an arithmetic number, because the mean of its divisors is an integer number (33992357910).

Almost surely, 2^124638645659 is an apocalyptic number.

124638645659 is a deficient number, since it is larger than the sum of its proper divisors (11330785981).

124638645659 is a wasteful number, since it uses less digits than its factorization.

124638645659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11330785980.

The product of its digits is 37324800, while the sum is 59.

The spelling of 124638645659 in words is "one hundred twenty-four billion, six hundred thirty-eight million, six hundred forty-five thousand, six hundred fifty-nine".