16545641604 has 24 divisors (see below), whose sum is σ = 38617450368. Its totient is φ = 5513649120.

The previous prime is 16545641599. The next prime is 16545641653. The reversal of 16545641604 is 40614654561.

It is a happy number.

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, 151132 + ... + 236499.

It is an arithmetic number, because the mean of its divisors is an integer number (1609060432).

Almost surely, 2^16545641604 is an apocalyptic number.

It is an amenable number.

16545641604 is an abundant number, since it is smaller than the sum of its proper divisors (22071808764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16545641604 is a wasteful number, since it uses less digits than its factorization.

16545641604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391195 (or 391193 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 16545641604 in words is "sixteen billion, five hundred forty-five million, six hundred forty-one thousand, six hundred four".