123868509451 has 2 divisors, whose sum is σ = 123868509452. Its totient is φ = 123868509450.

The previous prime is 123868509407. The next prime is 123868509469. The reversal of 123868509451 is 154905868321.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (154905868321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123868509451 - 2¹¹ = 123868507403 is a prime.

It is a super-2 number, since 2×123868509451² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123868509251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61934254725 + 61934254726.

It is an arithmetic number, because the mean of its divisors is an integer number (61934254726).

Almost surely, 2^123868509451 is an apocalyptic number.

123868509451 is a deficient number, since it is larger than the sum of its proper divisors (1).

123868509451 is an equidigital number, since it uses as much as digits as its factorization.

123868509451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 123868509451 in words is "one hundred twenty-three billion, eight hundred sixty-eight million, five hundred nine thousand, four hundred fifty-one".