145855191669 has 16 divisors (see below), whose sum is σ = 224632595520. Its totient is φ = 83197256960.

The previous prime is 145855191637. The next prime is 145855191739. The reversal of 145855191669 is 966191558541.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 145855191669 - 2⁵ = 145855191637 is a prime.

It is a super-2 number, since 2×145855191669² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145855190669) 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, 129995154 + ... + 129996275.

It is an arithmetic number, because the mean of its divisors is an integer number (14039537220).

Almost surely, 2^145855191669 is an apocalyptic number.

It is an amenable number.

145855191669 is a deficient number, since it is larger than the sum of its proper divisors (78777403851).

145855191669 is a wasteful number, since it uses less digits than its factorization.

145855191669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259991460.

The product of its digits is 11664000, while the sum is 60.

The spelling of 145855191669 in words is "one hundred forty-five billion, eight hundred fifty-five million, one hundred ninety-one thousand, six hundred sixty-nine".