124400015689 has 2 divisors, whose sum is σ = 124400015690. Its totient is φ = 124400015688.

The previous prime is 124400015681. The next prime is 124400015699. The reversal of 124400015689 is 986510004421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124244265289 + 155750400 = 352483^2 + 12480^2 .

It is a cyclic number.

It is not a de Polignac number, because 124400015689 - 2³ = 124400015681 is a prime.

It is a super-2 number, since 2×124400015689² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (124400015681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62200007844 + 62200007845.

It is an arithmetic number, because the mean of its divisors is an integer number (62200007845).

Almost surely, 2^124400015689 is an apocalyptic number.

It is an amenable number.

124400015689 is a deficient number, since it is larger than the sum of its proper divisors (1).

124400015689 is an equidigital number, since it uses as much as digits as its factorization.

124400015689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 124400015689 in words is "one hundred twenty-four billion, four hundred million, fifteen thousand, six hundred eighty-nine".