145885831166 has 4 divisors (see below), whose sum is σ = 218828746752. Its totient is φ = 72942915582.

The previous prime is 145885831043. The next prime is 145885831229. The reversal of 145885831166 is 661138588541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661138588541 = 282377 ⋅2341333.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36471457790 + ... + 36471457793.

It is an arithmetic number, because the mean of its divisors is an integer number (54707186688).

Almost surely, 2^145885831166 is an apocalyptic number.

145885831166 is a deficient number, since it is larger than the sum of its proper divisors (72942915586).

145885831166 is an equidigital number, since it uses as much as digits as its factorization.

145885831166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72942915585.

The product of its digits is 5529600, while the sum is 56.

The spelling of 145885831166 in words is "one hundred forty-five billion, eight hundred eighty-five million, eight hundred thirty-one thousand, one hundred sixty-six".