145684185544820 has 48 divisors (see below), whose sum is σ = 329471559825408. Its totient is φ = 53790892713600.

The previous prime is 145684185544817. The next prime is 145684185544837. The reversal of 145684185544820 is 28445581486541.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87341645 + ... + 88993995.

It is an arithmetic number, because the mean of its divisors is an integer number (6863990829696).

Almost surely, 2^{145684185544820} is an apocalyptic number.

145684185544820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145684185544820 is an abundant number, since it is smaller than the sum of its proper divisors (183787374280588).

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

145684185544820 is a wasteful number, since it uses less digits than its factorization.

145684185544820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991480 (or 1991478 counting only the distinct ones).

The product of its (nonzero) digits is 196608000, while the sum is 65.

The spelling of 145684185544820 in words is "one hundred forty-five trillion, six hundred eighty-four billion, one hundred eighty-five million, five hundred forty-four thousand, eight hundred twenty".