153638642 has 16 divisors (see below), whose sum is σ = 233086680. Its totient is φ = 75946752.

The previous prime is 153638633. The next prime is 153638651. The reversal of 153638642 is 246836351.

153638642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (153638633) and next prime (153638651).

It can be written as a sum of positive squares in 4 ways, for example, as 3845521 + 149793121 = 1961^2 + 12239^2 .

It is a junction number, because it is equal to n+sod(n) for n = 153638596 and 153638605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137984 + ... + 139092.

Almost surely, 2^153638642 is an apocalyptic number.

153638642 is a deficient number, since it is larger than the sum of its proper divisors (79448038).

153638642 is a wasteful number, since it uses less digits than its factorization.

153638642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837.

The product of its digits is 103680, while the sum is 38.

The square root of 153638642 is about 12395.1055663112. The cubic root of 153638642 is about 535.5912664183.

The spelling of 153638642 in words is "one hundred fifty-three million, six hundred thirty-eight thousand, six hundred forty-two".