163772538 has 16 divisors (see below), whose sum is σ = 329016576. Its totient is φ = 54345600.

The previous prime is 163772519. The next prime is 163772563. The reversal of 163772538 is 835277361.

It is a super-2 number, since 2×163772538² = 53642888405922888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163772538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59863 + ... + 62538.

It is an arithmetic number, because the mean of its divisors is an integer number (20563536).

Almost surely, 2^163772538 is an apocalyptic number.

163772538 is an abundant number, since it is smaller than the sum of its proper divisors (165244038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163772538 is a wasteful number, since it uses less digits than its factorization.

163772538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122629.

The product of its digits is 211680, while the sum is 42.

The square root of 163772538 is about 12797.3644943012. The cubic root of 163772538 is about 547.1171895029.

It can be divided in two parts, 16377 and 2538, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 163772538 in words is "one hundred sixty-three million, seven hundred seventy-two thousand, five hundred thirty-eight".