16505555970 has 32 divisors (see below), whose sum is σ = 39616828992. Its totient is φ = 4401093312.

The previous prime is 16505555953. The next prime is 16505555981. The reversal of 16505555970 is 7955550561.

It is a Curzon number.

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, 526044 + ... + 556536.

It is an arithmetic number, because the mean of its divisors is an integer number (1238025906).

Almost surely, 2^16505555970 is an apocalyptic number.

16505555970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16505555970 is an abundant number, since it is smaller than the sum of its proper divisors (23111273022).

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

16505555970 is a wasteful number, since it uses less digits than its factorization.

16505555970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48546.

The product of its (nonzero) digits is 1181250, while the sum is 48.

The spelling of 16505555970 in words is "sixteen billion, five hundred five million, five hundred fifty-five thousand, nine hundred seventy".