252985401601 has 4 divisors (see below), whose sum is σ = 263984766912. Its totient is φ = 241986036292.

The previous prime is 252985401589. The next prime is 252985401611. The reversal of 252985401601 is 106104589252.

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 a cyclic number.

It is not a de Polignac number, because 252985401601 - 2²¹ = 252983304449 is a prime.

It is a super-2 number, since 2×252985401601² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252985401611) 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, 5499682621 + ... + 5499682666.

It is an arithmetic number, because the mean of its divisors is an integer number (65996191728).

Almost surely, 2^252985401601 is an apocalyptic number.

It is an amenable number.

252985401601 is a deficient number, since it is larger than the sum of its proper divisors (10999365311).

252985401601 is a wasteful number, since it uses less digits than its factorization.

252985401601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10999365310.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 252985401601 in words is "two hundred fifty-two billion, nine hundred eighty-five million, four hundred one thousand, six hundred one".