163256477 has 4 divisors (see below), whose sum is σ = 165555936. Its totient is φ = 160957020.

The previous prime is 163256459. The next prime is 163256479. The reversal of 163256477 is 774652361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774652361 = 7 ⋅110664623.

It is a cyclic number.

It is not a de Polignac number, because 163256477 - 2⁸ = 163256221 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 (163256479) 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, 1149623 + ... + 1149764.

It is an arithmetic number, because the mean of its divisors is an integer number (41388984).

Almost surely, 2^163256477 is an apocalyptic number.

It is an amenable number.

163256477 is a deficient number, since it is larger than the sum of its proper divisors (2299459).

163256477 is an equidigital number, since it uses as much as digits as its factorization.

163256477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299458.

The product of its digits is 211680, while the sum is 41.

The square root of 163256477 is about 12777.1858012631. The cubic root of 163256477 is about 546.5419141183.

The spelling of 163256477 in words is "one hundred sixty-three million, two hundred fifty-six thousand, four hundred seventy-seven".