144999999991 has 64 divisors (see below), whose sum is σ = 185469419520. Its totient is φ = 110101824000.

The previous prime is 144999999979. The next prime is 145000000027. The reversal of 144999999991 is 199999999441.

It is not a de Polignac number, because 144999999991 - 2¹⁹ = 144999475703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144999999091) 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, 220030020 + ... + 220030678.

It is an arithmetic number, because the mean of its divisors is an integer number (2897959680).

Almost surely, 2^144999999991 is an apocalyptic number.

144999999991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

144999999991 is a deficient number, since it is larger than the sum of its proper divisors (40469419529).

144999999991 is a wasteful number, since it uses less digits than its factorization.

144999999991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its digits is 688747536, while the sum is 82.

It can be divided in two parts, 14 and 4999999991, that added together give a palindrome (5000000005).

The spelling of 144999999991 in words is "one hundred forty-four billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".