145772544 has 52 divisors (see below), whose sum is σ = 388712096. Its totient is φ = 48586752.

The previous prime is 145772533. The next prime is 145772581. The reversal of 145772544 is 445277541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6357 + ... + 18219.

Almost surely, 2^145772544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145772544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194356048).

145772544 is an abundant number, since it is smaller than the sum of its proper divisors (242939552).

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

145772544 is an equidigital number, since it uses as much as digits as its factorization.

145772544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11890 (or 11868 counting only the distinct ones).

The product of its digits is 156800, while the sum is 39.

The square root of 145772544 is about 12073.6301086293. The cubic root of 145772544 is about 526.2901530137.

The spelling of 145772544 in words is "one hundred forty-five million, seven hundred seventy-two thousand, five hundred forty-four".