104351142631561 has 4 divisors (see below), whose sum is σ = 119258448721792. Its totient is φ = 89443836541332.

The previous prime is 104351142631501. The next prime is 104351142631601. The reversal of 104351142631561 is 165136241153401.

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 de Polignac number, because none of the positive numbers 2^k-104351142631561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104351142631501) 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, 7453653045105 + ... + 7453653045118.

It is an arithmetic number, because the mean of its divisors is an integer number (29814612180448).

Almost surely, 2^{104351142631561} is an apocalyptic number.

It is an amenable number.

104351142631561 is a deficient number, since it is larger than the sum of its proper divisors (14907306090231).

104351142631561 is an equidigital number, since it uses as much as digits as its factorization.

104351142631561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907306090230.

The product of its (nonzero) digits is 259200, while the sum is 43.

Adding to 104351142631561 its reverse (165136241153401), we get a palindrome (269487383784962).

The spelling of 104351142631561 in words is "one hundred four trillion, three hundred fifty-one billion, one hundred forty-two million, six hundred thirty-one thousand, five hundred sixty-one".