145949197679 has 4 divisors (see below), whose sum is σ = 145951971576. Its totient is φ = 145946423784.

The previous prime is 145949197673. The next prime is 145949197741. The reversal of 145949197679 is 976791949541.

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

It is a cyclic number.

It is not a de Polignac number, because 145949197679 - 2⁴ = 145949197663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145949197673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306469 + ... + 1413774.

It is an arithmetic number, because the mean of its divisors is an integer number (36487992894).

Almost surely, 2^145949197679 is an apocalyptic number.

145949197679 is a deficient number, since it is larger than the sum of its proper divisors (2773897).

145949197679 is an equidigital number, since it uses as much as digits as its factorization.

145949197679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773896.

The product of its digits is 154314720, while the sum is 71.

The spelling of 145949197679 in words is "one hundred forty-five billion, nine hundred forty-nine million, one hundred ninety-seven thousand, six hundred seventy-nine".