133601161545 has 96 divisors (see below), whose sum is σ = 242675896320. Its totient is φ = 67908072960.

The previous prime is 133601161537. The next prime is 133601161591. The reversal of 133601161545 is 545161106331.

133601161545 is a `hidden beast` number, since 1 + 3 + 3 + 601 + 1 + 6 + 1 + 5 + 45 = 666.

It is not a de Polignac number, because 133601161545 - 2³ = 133601161537 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33676152 + ... + 33680118.

It is an arithmetic number, because the mean of its divisors is an integer number (2527873920).

Almost surely, 2^133601161545 is an apocalyptic number.

133601161545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133601161545 is a deficient number, since it is larger than the sum of its proper divisors (109074734775).

133601161545 is a wasteful number, since it uses less digits than its factorization.

133601161545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335 (or 4332 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

Adding to 133601161545 its reverse (545161106331), we get a palindrome (678762267876).

The spelling of 133601161545 in words is "one hundred thirty-three billion, six hundred one million, one hundred sixty-one thousand, five hundred forty-five".