15851551334851 has 2 divisors, whose sum is σ = 15851551334852. Its totient is φ = 15851551334850.

The previous prime is 15851551334711. The next prime is 15851551334863. The reversal of 15851551334851 is 15843315515851.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15851551334851 - 2¹¹ = 15851551332803 is a prime.

It is a super-3 number, since 3×15851551334851³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15851551334792 and 15851551334801.

It is not a weakly prime, because it can be changed into another prime (15851551334891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7925775667425 + 7925775667426.

It is an arithmetic number, because the mean of its divisors is an integer number (7925775667426).

Almost surely, 2^{15851551334851} is an apocalyptic number.

15851551334851 is a deficient number, since it is larger than the sum of its proper divisors (1).

15851551334851 is an equidigital number, since it uses as much as digits as its factorization.

15851551334851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200000, while the sum is 55.

The spelling of 15851551334851 in words is "fifteen trillion, eight hundred fifty-one billion, five hundred fifty-one million, three hundred thirty-four thousand, eight hundred fifty-one".