163406436690 has 32 divisors (see below), whose sum is σ = 448200512640. Its totient is φ = 37350042624.

The previous prime is 163406436679. The next prime is 163406436701. The reversal of 163406436690 is 96634604361.

It is an interprime number because it is at equal distance from previous prime (163406436679) and next prime (163406436701).

It is a super-2 number, since 2×163406436690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389062735 + ... + 389063154.

It is an arithmetic number, because the mean of its divisors is an integer number (14006266020).

Almost surely, 2^163406436690 is an apocalyptic number.

163406436690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163406436690 is an abundant number, since it is smaller than the sum of its proper divisors (284794075950).

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

163406436690 is a wasteful number, since it uses less digits than its factorization.

163406436690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778125906.

The product of its (nonzero) digits is 1679616, while the sum is 48.

The spelling of 163406436690 in words is "one hundred sixty-three billion, four hundred six million, four hundred thirty-six thousand, six hundred ninety".