252451729969 has 2 divisors, whose sum is σ = 252451729970. Its totient is φ = 252451729968.

The previous prime is 252451729963. The next prime is 252451729997. The reversal of 252451729969 is 969927154252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179504742400 + 72946987569 = 423680^2 + 270087^2 .

It is a cyclic number.

It is not a de Polignac number, because 252451729969 - 2³ = 252451729961 is a prime.

It is a super-2 number, since 2×252451729969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (252451729961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126225864984 + 126225864985.

It is an arithmetic number, because the mean of its divisors is an integer number (126225864985).

Almost surely, 2^252451729969 is an apocalyptic number.

It is an amenable number.

252451729969 is a deficient number, since it is larger than the sum of its proper divisors (1).

252451729969 is an equidigital number, since it uses as much as digits as its factorization.

252451729969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24494400, while the sum is 61.

The spelling of 252451729969 in words is "two hundred fifty-two billion, four hundred fifty-one million, seven hundred twenty-nine thousand, nine hundred sixty-nine".