145744331887 has 16 divisors (see below), whose sum is σ = 183506310144. Its totient is φ = 112442580000.

The previous prime is 145744331879. The next prime is 145744331897. The reversal of 145744331887 is 788133447541.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 145744331887 - 2³ = 145744331879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145744331807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9362439 + ... + 9377992.

It is an arithmetic number, because the mean of its divisors is an integer number (11469144384).

Almost surely, 2^145744331887 is an apocalyptic number.

145744331887 is a deficient number, since it is larger than the sum of its proper divisors (37761978257).

145744331887 is a wasteful number, since it uses less digits than its factorization.

145744331887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18740550.

The product of its digits is 9031680, while the sum is 55.

It can be divided in two parts, 1457 and 44331887, that added together give a palindrome (44333344).

The spelling of 145744331887 in words is "one hundred forty-five billion, seven hundred forty-four million, three hundred thirty-one thousand, eight hundred eighty-seven".