16070998981 has 2 divisors, whose sum is σ = 16070998982. Its totient is φ = 16070998980.

The previous prime is 16070998961. The next prime is 16070999023. The reversal of 16070998981 is 18989907061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15071490756 + 999508225 = 122766^2 + 31615^2 .

It is a cyclic number.

It is not a de Polignac number, because 16070998981 - 2²¹ = 16068901829 is a prime.

It is a super-2 number, since 2×16070998981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16070998921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8035499490 + 8035499491.

It is an arithmetic number, because the mean of its divisors is an integer number (8035499491).

Almost surely, 2^16070998981 is an apocalyptic number.

It is an amenable number.

16070998981 is a deficient number, since it is larger than the sum of its proper divisors (1).

16070998981 is an equidigital number, since it uses as much as digits as its factorization.

16070998981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 58.

The spelling of 16070998981 in words is "sixteen billion, seventy million, nine hundred ninety-eight thousand, nine hundred eighty-one".