188494545465 has 24 divisors (see below), whose sum is σ = 326739977928. Its totient is φ = 100525470720.

The previous prime is 188494545457. The next prime is 188494545553. The reversal of 188494545465 is 564545494881.

188494545465 is a `hidden beast` number, since 1 + 8 + 8 + 49 + 4 + 545 + 46 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 75047506704 + 113447038761 = 273948^2 + 336819^2 .

It is not a de Polignac number, because 188494545465 - 2³ = 188494545457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 934975 + ... + 1118555.

It is an arithmetic number, because the mean of its divisors is an integer number (13614165747).

Almost surely, 2^188494545465 is an apocalyptic number.

188494545465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

188494545465 is a deficient number, since it is larger than the sum of its proper divisors (138245432463).

188494545465 is a wasteful number, since it uses less digits than its factorization.

188494545465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206409 (or 206406 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 63.

The spelling of 188494545465 in words is "one hundred eighty-eight billion, four hundred ninety-four million, five hundred forty-five thousand, four hundred sixty-five".