561253256644361 has 8 divisors (see below), whose sum is σ = 563583064306944. Its totient is φ = 558923456882880.

The previous prime is 561253256644357. The next prime is 561253256644387. The reversal of 561253256644361 is 163446652352165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 561253256644361 - 2² = 561253256644357 is a prime.

It is a super-3 number, since 3×561253256644361³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561253256644361.

It is not an unprimeable number, because it can be changed into a prime (561253286644361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172196336 + ... + 175425438.

It is an arithmetic number, because the mean of its divisors is an integer number (70447883038368).

Almost surely, 2^{561253256644361} is an apocalyptic number.

It is an amenable number.

561253256644361 is a deficient number, since it is larger than the sum of its proper divisors (2329807662583).

561253256644361 is a wasteful number, since it uses less digits than its factorization.

561253256644361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950551.

The product of its digits is 93312000, while the sum is 59.

The spelling of 561253256644361 in words is "five hundred sixty-one trillion, two hundred fifty-three billion, two hundred fifty-six million, six hundred forty-four thousand, three hundred sixty-one".