145667721194120 has 32 divisors (see below), whose sum is σ = 327774328104600. Its totient is φ = 58263185292288.

The previous prime is 145667721194113. The next prime is 145667721194251. The reversal of 145667721194120 is 21491127766541.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 144727011304516 + 940709889604 = 12030254^2 + 969902^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121369919 + ... + 122564238.

Almost surely, 2^{145667721194120} is an apocalyptic number.

145667721194120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145667721194120 is an abundant number, since it is smaller than the sum of its proper divisors (182106606910480).

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

145667721194120 is a wasteful number, since it uses less digits than its factorization.

145667721194120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243949097 (or 243949093 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 145667721194120 in words is "one hundred forty-five trillion, six hundred sixty-seven billion, seven hundred twenty-one million, one hundred ninety-four thousand, one hundred twenty".