163900979388 has 48 divisors (see below), whose sum is σ = 427063840000. Its totient is φ = 54359111664.

The previous prime is 163900979387. The next prime is 163900979393. The reversal of 163900979388 is 883979009361.

163900979388 is a `hidden beast` number, since 163 + 9 + 0 + 0 + 97 + 9 + 388 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163900979387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3791578 + ... + 3834561.

Almost surely, 2^163900979388 is an apocalyptic number.

163900979388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

163900979388 is an abundant number, since it is smaller than the sum of its proper divisors (263162860612).

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

163900979388 is a wasteful number, since it uses less digits than its factorization.

163900979388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626351 (or 7626343 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 63.

The spelling of 163900979388 in words is "one hundred sixty-three billion, nine hundred million, nine hundred seventy-nine thousand, three hundred eighty-eight".