155065640 has 16 divisors (see below), whose sum is σ = 348897780. Its totient is φ = 62026240.

The previous prime is 155065637. The next prime is 155065681. The reversal of 155065640 is 46560551.

It can be written as a sum of positive squares in 2 ways, for example, as 130005604 + 25060036 = 11402^2 + 5006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155065597 and 155065606.

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 3 ways as a sum of consecutive naturals, for example, 1938281 + ... + 1938360.

Almost surely, 2^155065640 is an apocalyptic number.

155065640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155065640 is an abundant number, since it is smaller than the sum of its proper divisors (193832140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155065640 is a wasteful number, since it uses less digits than its factorization.

155065640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876652 (or 3876648 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 155065640 is about 12452.5354847918. The cubic root of 155065640 is about 537.2443521967.

The spelling of 155065640 in words is "one hundred fifty-five million, sixty-five thousand, six hundred forty".