155745072 has 80 divisors (see below), whose sum is σ = 510919680. Its totient is φ = 44497728.

The previous prime is 155745047. The next prime is 155745119. The reversal of 155745072 is 270547551.

155745072 is a `hidden beast` number, since 15 + 574 + 5 + 0 + 72 = 666.

It is a super-3 number, since 3×155745072³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22728 + ... + 28775.

It is an arithmetic number, because the mean of its divisors is an integer number (6386496).

Almost surely, 2^155745072 is an apocalyptic number.

155745072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155745072 is an abundant number, since it is smaller than the sum of its proper divisors (355174608).

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

155745072 is a wasteful number, since it uses less digits than its factorization.

155745072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51527 (or 51515 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 36.

The square root of 155745072 is about 12479.7865366360. The cubic root of 155745072 is about 538.0278680810.

The spelling of 155745072 in words is "one hundred fifty-five million, seven hundred forty-five thousand, seventy-two".