16401819755 has 16 divisors (see below), whose sum is σ = 20213992800. Its totient is φ = 12771321600.

The previous prime is 16401819737. The next prime is 16401819857. The reversal of 16401819755 is 55791810461.

It is not a de Polignac number, because 16401819755 - 2¹⁸ = 16401557611 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, 245450 + ... + 305039.

It is an arithmetic number, because the mean of its divisors is an integer number (1263374550).

Almost surely, 2^16401819755 is an apocalyptic number.

16401819755 is a deficient number, since it is larger than the sum of its proper divisors (3812173045).

16401819755 is a wasteful number, since it uses less digits than its factorization.

16401819755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550654.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 16401819755 in words is "sixteen billion, four hundred one million, eight hundred nineteen thousand, seven hundred fifty-five".