188142564 has 12 divisors (see below), whose sum is σ = 438999344. Its totient is φ = 62714184.

The previous prime is 188142557. The next prime is 188142571. The reversal of 188142564 is 465241881.

It is an interprime number because it is at equal distance from previous prime (188142557) and next prime (188142571).

It is a tau number, because it is divible by the number of its divisors (12).

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, 7839262 + ... + 7839285.

Almost surely, 2^188142564 is an apocalyptic number.

It is an amenable number.

188142564 is an abundant number, since it is smaller than the sum of its proper divisors (250856780).

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

188142564 is a wasteful number, since it uses less digits than its factorization.

188142564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15678554 (or 15678552 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 188142564 is about 13716.5069897551. The cubic root of 188142564 is about 573.0101999531.

The spelling of 188142564 in words is "one hundred eighty-eight million, one hundred forty-two thousand, five hundred sixty-four".