155580447 has 64 divisors (see below), whose sum is σ = 253186560. Its totient is φ = 83865600.

The previous prime is 155580443. The next prime is 155580473. The reversal of 155580447 is 744085551.

It is not a de Polignac number, because 155580447 - 2² = 155580443 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155580443) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1187572 + ... + 1187702.

It is an arithmetic number, because the mean of its divisors is an integer number (3956040).

Almost surely, 2^155580447 is an apocalyptic number.

155580447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

155580447 is a deficient number, since it is larger than the sum of its proper divisors (97606113).

155580447 is a wasteful number, since it uses less digits than its factorization.

155580447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 112000, while the sum is 39.

The square root of 155580447 is about 12473.1891270837. The cubic root of 155580447 is about 537.8382332660.

The spelling of 155580447 in words is "one hundred fifty-five million, five hundred eighty thousand, four hundred forty-seven".