163556002 has 4 divisors (see below), whose sum is σ = 245334006. Its totient is φ = 81778000.

The previous prime is 163555999. The next prime is 163556023. The reversal of 163556002 is 200655361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200655361 = 47 ⋅4269263.

It can be written as a sum of positive squares in only one way, i.e., 156475081 + 7080921 = 12509^2 + 2661^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40888999 + ... + 40889002.

Almost surely, 2^163556002 is an apocalyptic number.

163556002 is a deficient number, since it is larger than the sum of its proper divisors (81778004).

163556002 is an equidigital number, since it uses as much as digits as its factorization.

163556002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81778003.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 163556002 is about 12788.9015165494. The cubic root of 163556002 is about 546.8759548805.

The spelling of 163556002 in words is "one hundred sixty-three million, five hundred fifty-six thousand, two".