813157845 has 16 divisors (see below), whose sum is σ = 1315673280. Its totient is φ = 428810624.

The previous prime is 813157841. The next prime is 813157867. The reversal of 813157845 is 548751318.

It is a cyclic number.

It is not a de Polignac number, because 813157845 - 2² = 813157841 is a prime.

It is a super-2 number, since 2×813157845² = 1322451361770088050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813157797 and 813157806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813157841) 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, 303219 + ... + 305888.

It is an arithmetic number, because the mean of its divisors is an integer number (82229580).

Almost surely, 2^813157845 is an apocalyptic number.

It is an amenable number.

813157845 is a deficient number, since it is larger than the sum of its proper divisors (502515435).

813157845 is a wasteful number, since it uses less digits than its factorization.

813157845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609204.

The product of its digits is 134400, while the sum is 42.

The square root of 813157845 is about 28515.9226573506. The cubic root of 813157845 is about 933.3795585807.

The spelling of 813157845 in words is "eight hundred thirteen million, one hundred fifty-seven thousand, eight hundred forty-five".