1641311604 has 36 divisors (see below), whose sum is σ = 4150298880. Its totient is φ = 546915600.

The previous prime is 1641311593. The next prime is 1641311621. The reversal of 1641311604 is 4061131461.

1641311604 is a `hidden beast` number, since 1 + 6 + 41 + 3 + 11 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132717 + ... + 144555.

It is an arithmetic number, because the mean of its divisors is an integer number (115286080).

Almost surely, 2^1641311604 is an apocalyptic number.

It is an amenable number.

1641311604 is an abundant number, since it is smaller than the sum of its proper divisors (2508987276).

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

1641311604 is a wasteful number, since it uses less digits than its factorization.

1641311604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15700 (or 15695 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1641311604 is about 40513.1041022531. The cubic root of 1641311604 is about 1179.5880022941.

The spelling of 1641311604 in words is "one billion, six hundred forty-one million, three hundred eleven thousand, six hundred four".