144778295772 has 144 divisors (see below), whose sum is σ = 401424721152. Its totient is φ = 43632483840.

The previous prime is 144778295749. The next prime is 144778295791. The reversal of 144778295772 is 277592877441.

144778295772 is a `hidden beast` number, since 1 + 4 + 477 + 8 + 2 + 95 + 7 + 72 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81472548 + ... + 81474324.

Almost surely, 2^144778295772 is an apocalyptic number.

144778295772 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 144778295772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200712360576).

144778295772 is an abundant number, since it is smaller than the sum of its proper divisors (256646425380).

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

144778295772 is a wasteful number, since it uses less digits than its factorization.

144778295772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808 (or 2803 counting only the distinct ones).

The product of its digits is 55319040, while the sum is 63.

The spelling of 144778295772 in words is "one hundred forty-four billion, seven hundred seventy-eight million, two hundred ninety-five thousand, seven hundred seventy-two".