16541257648 has 20 divisors (see below), whose sum is σ = 32263783200. Its totient is φ = 8215120064.

The previous prime is 16541257639. The next prime is 16541257661. The reversal of 16541257648 is 84675214561.

It is a super-2 number, since 2×16541257648² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466840 + ... + 3471607.

It is an arithmetic number, because the mean of its divisors is an integer number (1613189160).

Almost surely, 2^16541257648 is an apocalyptic number.

It is an amenable number.

16541257648 is a deficient number, since it is larger than the sum of its proper divisors (15722525552).

16541257648 is a wasteful number, since it uses less digits than its factorization.

16541257648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6938604 (or 6938598 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 49.

The spelling of 16541257648 in words is "sixteen billion, five hundred forty-one million, two hundred fifty-seven thousand, six hundred forty-eight".