158772544 has 84 divisors (see below), whose sum is σ = 369797076. Its totient is φ = 67436544.

The previous prime is 158772539. The next prime is 158772547. The reversal of 158772544 is 445277851.

It can be written as a sum of positive squares in 2 ways, for example, as 155950144 + 2822400 = 12488^2 + 1680^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 158772544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158772547) 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 11 ways as a sum of consecutive naturals, for example, 617664 + ... + 617920.

Almost surely, 2^158772544 is an apocalyptic number.

158772544 is a gapful number since it is divisible by the number (14) 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 158772544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184898538).

158772544 is an abundant number, since it is smaller than the sum of its proper divisors (211024532).

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

158772544 is a wasteful number, since it uses less digits than its factorization.

158772544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 463 counting only the distinct ones).

The product of its digits is 313600, while the sum is 43.

The square root of 158772544 is about 12600.4977679455. The cubic root of 158772544 is about 541.4916963020.

The spelling of 158772544 in words is "one hundred fifty-eight million, seven hundred seventy-two thousand, five hundred forty-four".