163279701556 has 6 divisors (see below), whose sum is σ = 285739477730. Its totient is φ = 81639850776.

The previous prime is 163279701461. The next prime is 163279701581. The reversal of 163279701556 is 655107972361.

163279701556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 121197281956 + 42082419600 = 348134^2 + 205140^2 .

It is a super-2 number, since 2×163279701556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20409962691 + ... + 20409962698.

Almost surely, 2^163279701556 is an apocalyptic number.

It is an amenable number.

163279701556 is a deficient number, since it is larger than the sum of its proper divisors (122459776174).

163279701556 is a wasteful number, since it uses less digits than its factorization.

163279701556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40819925393 (or 40819925391 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 52.

The spelling of 163279701556 in words is "one hundred sixty-three billion, two hundred seventy-nine million, seven hundred one thousand, five hundred fifty-six".