16553660426 has 16 divisors (see below), whose sum is σ = 25714993920. Its totient is φ = 7983735840.

The previous prime is 16553660419. The next prime is 16553660443. The reversal of 16553660426 is 62406635561.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415811 + ... + 453878.

It is an arithmetic number, because the mean of its divisors is an integer number (1607187120).

Almost surely, 2^16553660426 is an apocalyptic number.

16553660426 is a deficient number, since it is larger than the sum of its proper divisors (9161333494).

16553660426 is a wasteful number, since it uses less digits than its factorization.

16553660426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870029.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 16553660426 in words is "sixteen billion, five hundred fifty-three million, six hundred sixty thousand, four hundred twenty-six".