163577642 has 4 divisors (see below), whose sum is σ = 245366466. Its totient is φ = 81788820.

The previous prime is 163577627. The next prime is 163577657. The reversal of 163577642 is 246775361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246775361 = 7 ⋅35253623.

It is an interprime number because it is at equal distance from previous prime (163577627) and next prime (163577657).

It can be written as a sum of positive squares in only one way, i.e., 154281241 + 9296401 = 12421^2 + 3049^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 163577642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40894409 + ... + 40894412.

Almost surely, 2^163577642 is an apocalyptic number.

163577642 is a deficient number, since it is larger than the sum of its proper divisors (81788824).

163577642 is an equidigital number, since it uses as much as digits as its factorization.

163577642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81788823.

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

The square root of 163577642 is about 12789.7475346466. The cubic root of 163577642 is about 546.9000727639.

The spelling of 163577642 in words is "one hundred sixty-three million, five hundred seventy-seven thousand, six hundred forty-two".