16019187457 has 12 divisors (see below), whose sum is σ = 20067993876. Its totient is φ = 12674521440.

The previous prime is 16019187433. The next prime is 16019187487. The reversal of 16019187457 is 75478191061.

16019187457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1443696016 + 14575491441 = 37996^2 + 120729^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16019187457 is a prime.

It is a super-2 number, since 2×16019187457² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 16019187457.

It is not an unprimeable number, because it can be changed into a prime (16019187487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12573294 + ... + 12574567.

It is an arithmetic number, because the mean of its divisors is an integer number (1672332823).

Almost surely, 2^16019187457 is an apocalyptic number.

It is an amenable number.

16019187457 is a deficient number, since it is larger than the sum of its proper divisors (4048806419).

16019187457 is a wasteful number, since it uses less digits than its factorization.

16019187457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25147888 (or 25147881 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 49.

The spelling of 16019187457 in words is "sixteen billion, nineteen million, one hundred eighty-seven thousand, four hundred fifty-seven".