155653138 has 8 divisors (see below), whose sum is σ = 239174460. Its totient is φ = 75928320.

The previous prime is 155653129. The next prime is 155653153. The reversal of 155653138 is 831356551.

It can be written as a sum of positive squares in 2 ways, for example, as 154678969 + 974169 = 12437^2 + 987^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 155653097 and 155653106.

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, 949023 + ... + 949186.

Almost surely, 2^155653138 is an apocalyptic number.

155653138 is a deficient number, since it is larger than the sum of its proper divisors (83521322).

155653138 is a wasteful number, since it uses less digits than its factorization.

155653138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898252.

The product of its digits is 54000, while the sum is 37.

The square root of 155653138 is about 12476.1026767176. The cubic root of 155653138 is about 537.9219839610.

The spelling of 155653138 in words is "one hundred fifty-five million, six hundred fifty-three thousand, one hundred thirty-eight".