145531894336 has 56 divisors (see below), whose sum is σ = 302105187000. Its totient is φ = 69467295744.

The previous prime is 145531894331. The next prime is 145531894447. The reversal of 145531894336 is 633498135541.

It can be written as a sum of positive squares in 4 ways, for example, as 32958223936 + 112573670400 = 181544^2 + 335520^2 .

It is not an unprimeable number, because it can be changed into a prime (145531894331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275331 + ... + 605698.

Almost surely, 2^145531894336 is an apocalyptic number.

145531894336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

145531894336 is an abundant number, since it is smaller than the sum of its proper divisors (156573292664).

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

145531894336 is an equidigital number, since it uses as much as digits as its factorization.

145531894336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881159 (or 881149 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 52.

The spelling of 145531894336 in words is "one hundred forty-five billion, five hundred thirty-one million, eight hundred ninety-four thousand, three hundred thirty-six".