145171685808 has 80 divisors (see below), whose sum is σ = 416742300000. Its totient is φ = 48385244160.

The previous prime is 145171685803. The next prime is 145171685819. The reversal of 145171685808 is 808586171541.

145171685808 is a `hidden beast` number, since 1 + 4 + 51 + 7 + 1 + 6 + 8 + 580 + 8 = 666.

145171685808 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×145171685808² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (145171685803) 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, 7009228 + ... + 7029908.

It is an arithmetic number, because the mean of its divisors is an integer number (5209278750).

Almost surely, 2^145171685808 is an apocalyptic number.

145171685808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

145171685808 is an abundant number, since it is smaller than the sum of its proper divisors (271570614192).

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

145171685808 is a wasteful number, since it uses less digits than its factorization.

145171685808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36947 (or 36935 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 54.

The spelling of 145171685808 in words is "one hundred forty-five billion, one hundred seventy-one million, six hundred eighty-five thousand, eight hundred eight".