163775403915 has 16 divisors (see below), whose sum is σ = 262063097376. Its totient is φ = 87339398400.

The previous prime is 163775403887. The next prime is 163775403929. The reversal of 163775403915 is 519304577361.

It is a happy number.

It is not a de Polignac number, because 163775403915 - 2¹⁰ = 163775402891 is a prime.

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, 284506 + ... + 639135.

It is an arithmetic number, because the mean of its divisors is an integer number (16378943586).

Almost surely, 2^163775403915 is an apocalyptic number.

163775403915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163775403915 is a deficient number, since it is larger than the sum of its proper divisors (98287693461).

163775403915 is a wasteful number, since it uses less digits than its factorization.

163775403915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935470.

The product of its (nonzero) digits is 2381400, while the sum is 51.

The spelling of 163775403915 in words is "one hundred sixty-three billion, seven hundred seventy-five million, four hundred three thousand, nine hundred fifteen".