145488416840 has 64 divisors (see below), whose sum is σ = 364685857200. Its totient is φ = 51866422272.

The previous prime is 145488416837. The next prime is 145488416849. The reversal of 145488416840 is 48614884541.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 75164802244 + 70323614596 = 274162^2 + 265186^2 .

It is not an unprimeable number, because it can be changed into a prime (145488416849) 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, 4808807 + ... + 4838966.

Almost surely, 2^145488416840 is an apocalyptic number.

145488416840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145488416840 is an abundant number, since it is smaller than the sum of its proper divisors (219197440360).

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

145488416840 is a wasteful number, since it uses less digits than its factorization.

145488416840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9647826 (or 9647822 counting only the distinct ones).

The product of its (nonzero) digits is 3932160, while the sum is 53.

The spelling of 145488416840 in words is "one hundred forty-five billion, four hundred eighty-eight million, four hundred sixteen thousand, eight hundred forty".