104105215515551 has 2 divisors, whose sum is σ = 104105215515552. Its totient is φ = 104105215515550.

The previous prime is 104105215515547. The next prime is 104105215515557. The reversal of 104105215515551 is 155515512501401.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 104105215515551 - 2² = 104105215515547 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 104105215515499 and 104105215515508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104105215515557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52052607757775 + 52052607757776.

It is an arithmetic number, because the mean of its divisors is an integer number (52052607757776).

Almost surely, 2^{104105215515551} is an apocalyptic number.

104105215515551 is a deficient number, since it is larger than the sum of its proper divisors (1).

104105215515551 is an equidigital number, since it uses as much as digits as its factorization.

104105215515551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125000, while the sum is 41.

The spelling of 104105215515551 in words is "one hundred four trillion, one hundred five billion, two hundred fifteen million, five hundred fifteen thousand, five hundred fifty-one".