581620572401 has 4 divisors (see below), whose sum is σ = 634495169904. Its totient is φ = 528745974900.

The previous prime is 581620572397. The next prime is 581620572409. The reversal of 581620572401 is 104275026185.

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 not a de Polignac number, because 581620572401 - 2² = 581620572397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (581620572409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26437298735 + ... + 26437298756.

It is an arithmetic number, because the mean of its divisors is an integer number (158623792476).

Almost surely, 2^581620572401 is an apocalyptic number.

It is an amenable number.

581620572401 is a deficient number, since it is larger than the sum of its proper divisors (52874597503).

581620572401 is a wasteful number, since it uses less digits than its factorization.

581620572401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52874597502.

The product of its (nonzero) digits is 134400, while the sum is 41.

Adding to 581620572401 its reverse (104275026185), we get a palindrome (685895598586).

The spelling of 581620572401 in words is "five hundred eighty-one billion, six hundred twenty million, five hundred seventy-two thousand, four hundred one".