153661402 has 8 divisors (see below), whose sum is σ = 244050516. Its totient is φ = 72311232.

The previous prime is 153661397. The next prime is 153661411. The reversal of 153661402 is 204166351.

It can be written as a sum of positive squares in 2 ways, for example, as 141348321 + 12313081 = 11889^2 + 3509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×153661402² = 47223652929211208, which contains 22 as substring.

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, 2259693 + ... + 2259760.

Almost surely, 2^153661402 is an apocalyptic number.

153661402 is a deficient number, since it is larger than the sum of its proper divisors (90389114).

153661402 is a wasteful number, since it uses less digits than its factorization.

153661402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4519472.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 153661402 is about 12396.0236366345. The cubic root of 153661402 is about 535.6177125762.

The spelling of 153661402 in words is "one hundred fifty-three million, six hundred sixty-one thousand, four hundred two".