163939399361 has 8 divisors (see below), whose sum is σ = 164140071744. Its totient is φ = 163738797840.

The previous prime is 163939399307. The next prime is 163939399363. The reversal of 163939399361 is 163993939361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163939399361 - 2⁶ = 163939399297 is a prime.

It is a super-2 number, since 2×163939399361² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163939399294 and 163939399303.

It is not an unprimeable number, because it can be changed into a prime (163939399363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5713631 + ... + 5742251.

It is an arithmetic number, because the mean of its divisors is an integer number (20517508968).

Almost surely, 2^163939399361 is an apocalyptic number.

It is an amenable number.

163939399361 is a deficient number, since it is larger than the sum of its proper divisors (200672383).

163939399361 is an equidigital number, since it uses as much as digits as its factorization.

163939399361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35431.

The product of its digits is 19131876, while the sum is 62.

The spelling of 163939399361 in words is "one hundred sixty-three billion, nine hundred thirty-nine million, three hundred ninety-nine thousand, three hundred sixty-one".