145359677857891 has 4 divisors (see below), whose sum is σ = 166125346123312. Its totient is φ = 124594009592472.

The previous prime is 145359677857859. The next prime is 145359677857909. The reversal of 145359677857891 is 198758776953541.

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

It is not a de Polignac number, because 145359677857891 - 2⁵ = 145359677857859 is a prime.

It is a super-2 number, since 2×145359677857891² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145359677857799 and 145359677857808.

It is not an unprimeable number, because it can be changed into a prime (145359677867891) 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, 10382834132700 + ... + 10382834132713.

It is an arithmetic number, because the mean of its divisors is an integer number (41531336530828).

Almost surely, 2^{145359677857891} is an apocalyptic number.

145359677857891 is a deficient number, since it is larger than the sum of its proper divisors (20765668265421).

145359677857891 is an equidigital number, since it uses as much as digits as its factorization.

145359677857891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20765668265420.

The product of its digits is 16003008000, while the sum is 85.

The spelling of 145359677857891 in words is "one hundred forty-five trillion, three hundred fifty-nine billion, six hundred seventy-seven million, eight hundred fifty-seven thousand, eight hundred ninety-one".