16148390681 has 4 divisors (see below), whose sum is σ = 16998306000. Its totient is φ = 15298475364.

The previous prime is 16148390651. The next prime is 16148390717. The reversal of 16148390681 is 18609384161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18609384161 = 29671 ⋅627191.

It is a cyclic number.

It is not a de Polignac number, because 16148390681 - 2⁶ = 16148390617 is a prime.

It is a super-2 number, since 2×16148390681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16148390611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424957631 + ... + 424957668.

It is an arithmetic number, because the mean of its divisors is an integer number (4249576500).

Almost surely, 2^16148390681 is an apocalyptic number.

It is an amenable number.

16148390681 is a deficient number, since it is larger than the sum of its proper divisors (849915319).

16148390681 is an equidigital number, since it uses as much as digits as its factorization.

16148390681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849915318.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 16148390681 in words is "sixteen billion, one hundred forty-eight million, three hundred ninety thousand, six hundred eighty-one".