16501255313551 has 2 divisors, whose sum is σ = 16501255313552. Its totient is φ = 16501255313550.

The previous prime is 16501255313479. The next prime is 16501255313563. The reversal of 16501255313551 is 15531355210561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16501255313551 - 2³⁵ = 16466895575183 is a prime.

It is a super-2 number, since 2×16501255313551² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16501255313498 and 16501255313507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16501255313351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250627656775 + 8250627656776.

It is an arithmetic number, because the mean of its divisors is an integer number (8250627656776).

Almost surely, 2^{16501255313551} is an apocalyptic number.

16501255313551 is a deficient number, since it is larger than the sum of its proper divisors (1).

16501255313551 is an equidigital number, since it uses as much as digits as its factorization.

16501255313551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 337500, while the sum is 43.

The spelling of 16501255313551 in words is "sixteen trillion, five hundred one billion, two hundred fifty-five million, three hundred thirteen thousand, five hundred fifty-one".