155265040 has 40 divisors (see below), whose sum is σ = 412562880. Its totient is φ = 53233536.

The previous prime is 155265023. The next prime is 155265053. The reversal of 155265040 is 40562551.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138070 + ... + 139189.

It is an arithmetic number, because the mean of its divisors is an integer number (10314072).

Almost surely, 2^155265040 is an apocalyptic number.

155265040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155265040 is an abundant number, since it is smaller than the sum of its proper divisors (257297840).

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

155265040 is a wasteful number, since it uses less digits than its factorization.

155265040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277279 (or 277273 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 155265040 is about 12460.5393141710. The cubic root of 155265040 is about 537.4745356604.

The spelling of 155265040 in words is "one hundred fifty-five million, two hundred sixty-five thousand, forty".