813166173955 has 16 divisors (see below), whose sum is σ = 1013974375680. Its totient is φ = 625284148608.

The previous prime is 813166173889. The next prime is 813166173991. The reversal of 813166173955 is 559371661318.

It is a cyclic number.

It is not a de Polignac number, because 813166173955 - 2¹⁷ = 813166042883 is a prime.

It is a super-2 number, since 2×813166173955² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813166173896 and 813166173905.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12541752 + ... + 12606421.

It is an arithmetic number, because the mean of its divisors is an integer number (63373398480).

Almost surely, 2^813166173955 is an apocalyptic number.

813166173955 is a deficient number, since it is larger than the sum of its proper divisors (200808201725).

813166173955 is a wasteful number, since it uses less digits than its factorization.

813166173955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25148430.

The product of its digits is 4082400, while the sum is 55.

The spelling of 813166173955 in words is "eight hundred thirteen billion, one hundred sixty-six million, one hundred seventy-three thousand, nine hundred fifty-five".