145894871546 has 4 divisors (see below), whose sum is σ = 218842307322. Its totient is φ = 72947435772.

The previous prime is 145894871519. The next prime is 145894871557. The reversal of 145894871546 is 645178498541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 108497113321 + 37397758225 = 329389^2 + 193385^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36473717885 + ... + 36473717888.

Almost surely, 2^145894871546 is an apocalyptic number.

145894871546 is a deficient number, since it is larger than the sum of its proper divisors (72947435776).

145894871546 is an equidigital number, since it uses as much as digits as its factorization.

145894871546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72947435775.

The product of its digits is 38707200, while the sum is 62.

The spelling of 145894871546 in words is "one hundred forty-five billion, eight hundred ninety-four million, eight hundred seventy-one thousand, five hundred forty-six".