123536536457 has 4 divisors (see below), whose sum is σ = 128907690240. Its totient is φ = 118165382676.

The previous prime is 123536536451. The next prime is 123536536463. The reversal of 123536536457 is 754635635321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (123536536451) and next prime (123536536463).

It is a cyclic number.

It is not a de Polignac number, because 123536536457 - 2⁴ = 123536536441 is a prime.

It is a super-2 number, since 2×123536536457² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123536536451) 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, 2685576857 + ... + 2685576902.

It is an arithmetic number, because the mean of its divisors is an integer number (32226922560).

Almost surely, 2^123536536457 is an apocalyptic number.

It is an amenable number.

123536536457 is a deficient number, since it is larger than the sum of its proper divisors (5371153783).

123536536457 is an equidigital number, since it uses as much as digits as its factorization.

123536536457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5371153782.

The product of its digits is 6804000, while the sum is 50.

The spelling of 123536536457 in words is "one hundred twenty-three billion, five hundred thirty-six million, five hundred thirty-six thousand, four hundred fifty-seven".