155664538 has 8 divisors (see below), whose sum is σ = 237454560. Its totient is φ = 76513020.

The previous prime is 155664503. The next prime is 155664539. The reversal of 155664538 is 835466551.

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 = 155664494 and 155664503.

It is not an unprimeable number, because it can be changed into a prime (155664539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659478 + ... + 659713.

It is an arithmetic number, because the mean of its divisors is an integer number (29681820).

Almost surely, 2^155664538 is an apocalyptic number.

155664538 is a deficient number, since it is larger than the sum of its proper divisors (81790022).

155664538 is a wasteful number, since it uses less digits than its factorization.

155664538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319252.

The product of its digits is 432000, while the sum is 43.

The square root of 155664538 is about 12476.5595417968. The cubic root of 155664538 is about 537.9351160679.

The spelling of 155664538 in words is "one hundred fifty-five million, six hundred sixty-four thousand, five hundred thirty-eight".