153661401 has 16 divisors (see below), whose sum is σ = 235497600. Its totient is φ = 98907984.

The previous prime is 153661397. The next prime is 153661411. The reversal of 153661401 is 104166351.

153661401 is a `hidden beast` number, since 15 + 36 + 614 + 0 + 1 = 666.

It is not a de Polignac number, because 153661401 - 2² = 153661397 is a prime.

It is a super-2 number, since 2×153661401² = 47223652314565602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (153661411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97341 + ... + 98906.

It is an arithmetic number, because the mean of its divisors is an integer number (14718600).

Almost surely, 2^153661401 is an apocalyptic number.

It is an amenable number.

153661401 is a deficient number, since it is larger than the sum of its proper divisors (81836199).

153661401 is a wasteful number, since it uses less digits than its factorization.

153661401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196285 (or 196279 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 153661401 is about 12396.0235962989. The cubic root of 153661401 is about 535.6177114143.

The spelling of 153661401 in words is "one hundred fifty-three million, six hundred sixty-one thousand, four hundred one".