252643026543715 has 4 divisors (see below), whose sum is σ = 303171631852464. Its totient is φ = 202114421234968.

The previous prime is 252643026543683. The next prime is 252643026543749. The reversal of 252643026543715 is 517345620346252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252643026543715 - 2⁵ = 252643026543683 is a prime.

It is a super-2 number, since 2×252643026543715² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25264302654367 + ... + 25264302654376.

It is an arithmetic number, because the mean of its divisors is an integer number (75792907963116).

Almost surely, 2^{252643026543715} is an apocalyptic number.

252643026543715 is a deficient number, since it is larger than the sum of its proper divisors (50528605308749).

252643026543715 is an equidigital number, since it uses as much as digits as its factorization.

252643026543715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50528605308748.

The product of its (nonzero) digits is 36288000, while the sum is 55.

Adding to 252643026543715 its reverse (517345620346252), we get a palindrome (769988646889967).

The spelling of 252643026543715 in words is "two hundred fifty-two trillion, six hundred forty-three billion, twenty-six million, five hundred forty-three thousand, seven hundred fifteen".