145847323440 has 800 divisors, whose sum is σ = 660163996800. Its totient is φ = 28960063488.

The previous prime is 145847323403. The next prime is 145847323481. The reversal of 145847323440 is 44323748541.

145847323440 is a `hidden beast` number, since 1 + 4 + 584 + 7 + 3 + 23 + 4 + 40 = 666.

It is a super-2 number, since 2×145847323440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 10017286 + ... + 10031834.

It is an arithmetic number, because the mean of its divisors is an integer number (825204996).

Almost surely, 2^145847323440 is an apocalyptic number.

145847323440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145847323440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330081998400).

145847323440 is an abundant number, since it is smaller than the sum of its proper divisors (514316673360).

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

145847323440 is a wasteful number, since it uses less digits than its factorization.

145847323440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14611 (or 14596 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 145847323440 in words is "one hundred forty-five billion, eight hundred forty-seven million, three hundred twenty-three thousand, four hundred forty".