155615472 has 80 divisors (see below), whose sum is σ = 470208000. Its totient is φ = 49139136.

The previous prime is 155615419. The next prime is 155615477. The reversal of 155615472 is 274516551.

155615472 is a `hidden beast` number, since 1 + 55 + 61 + 547 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155615477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272 + ... + 17687.

It is an arithmetic number, because the mean of its divisors is an integer number (5877600).

Almost surely, 2^155615472 is an apocalyptic number.

155615472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155615472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235104000).

155615472 is an abundant number, since it is smaller than the sum of its proper divisors (314592528).

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

155615472 is a wasteful number, since it uses less digits than its factorization.

155615472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18995 (or 18983 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 155615472 is about 12474.5930594950. The cubic root of 155615472 is about 537.8785904596.

The spelling of 155615472 in words is "one hundred fifty-five million, six hundred fifteen thousand, four hundred seventy-two".