16880287729 has 2 divisors, whose sum is σ = 16880287730. Its totient is φ = 16880287728.

The previous prime is 16880287709. The next prime is 16880287789. The reversal of 16880287729 is 92778208861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14901817329 + 1978470400 = 122073^2 + 44480^2 .

It is a cyclic number.

It is not a de Polignac number, because 16880287729 - 2²¹ = 16878190577 is a prime.

It is a super-2 number, since 2×16880287729² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16880287709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8440143864 + 8440143865.

It is an arithmetic number, because the mean of its divisors is an integer number (8440143865).

Almost surely, 2^16880287729 is an apocalyptic number.

It is an amenable number.

16880287729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16880287729 is an equidigital number, since it uses as much as digits as its factorization.

16880287729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 16880287729 in words is "sixteen billion, eight hundred eighty million, two hundred eighty-seven thousand, seven hundred twenty-nine".