155675440 has 20 divisors (see below), whose sum is σ = 361945584. Its totient is φ = 62270144.

The previous prime is 155675419. The next prime is 155675447. The reversal of 155675440 is 44576551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 155675440.

It is not an unprimeable number, because it can be changed into a prime (155675447) by changing a digit.

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, 972892 + ... + 973051.

Almost surely, 2^155675440 is an apocalyptic number.

155675440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155675440 is an abundant number, since it is smaller than the sum of its proper divisors (206270144).

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

155675440 is a wasteful number, since it uses less digits than its factorization.

155675440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945956 (or 1945950 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 155675440 is about 12476.9964334370. The cubic root of 155675440 is about 537.9476739093.

The spelling of 155675440 in words is "one hundred fifty-five million, six hundred seventy-five thousand, four hundred forty".