145881219136 has 21 divisors (see below), whose sum is σ = 289489107711. Its totient is φ = 72939081792.

The previous prime is 145881219097. The next prime is 145881219137. The reversal of 145881219136 is 631912188541.

The square root of 145881219136 is 381944.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145881219136.

It is not an unprimeable number, because it can be changed into a prime (145881219137) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3031681 + ... + 3079423.

Almost surely, 2^145881219136 is an apocalyptic number.

145881219136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

145881219136 is the 381944-th square number.

It is an amenable number.

145881219136 is a deficient number, since it is larger than the sum of its proper divisors (143607888575).

145881219136 is an frugal number, since it uses more digits than its factorization.

145881219136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95498 (or 47745 counting only the distinct ones).

The product of its digits is 414720, while the sum is 49.

Multiplying 145881219136 by its sum of digits (49), we get a square (7148179737664 = 2673608²).

The spelling of 145881219136 in words is "one hundred forty-five billion, eight hundred eighty-one million, two hundred nineteen thousand, one hundred thirty-six".