194961564 has 36 divisors (see below), whose sum is σ = 563223024. Its totient is φ = 55703232.

The previous prime is 194961563. The next prime is 194961581. The reversal of 194961564 is 465169491.

It is a happy number.

194961564 is a `hidden beast` number, since 1 + 9 + 496 + 156 + 4 = 666.

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

It is a super-2 number, since 2×194961564² = 76020022874652192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194961563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 386577 + ... + 387080.

It is an arithmetic number, because the mean of its divisors is an integer number (15645084).

Almost surely, 2^194961564 is an apocalyptic number.

194961564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

194961564 is an abundant number, since it is smaller than the sum of its proper divisors (368261460).

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

194961564 is a wasteful number, since it uses less digits than its factorization.

194961564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773674 (or 773669 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 194961564 is about 13962.8637463810. The cubic root of 194961564 is about 579.8508970672.

The spelling of 194961564 in words is "one hundred ninety-four million, nine hundred sixty-one thousand, five hundred sixty-four".