16400400280555 has 16 divisors (see below), whose sum is σ = 19861502284800. Its totient is φ = 12999644588160.

The previous prime is 16400400280543. The next prime is 16400400280567. The reversal of 16400400280555 is 55508200400461.

16400400280555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16400400280543) and next prime (16400400280567).

It is not a de Polignac number, because 16400400280555 - 2⁷ = 16400400280427 is a prime.

It is a super-2 number, since 2×16400400280555² (a number of 27 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, 24433125 + ... + 25095385.

It is an arithmetic number, because the mean of its divisors is an integer number (1241343892800).

Almost surely, 2^{16400400280555} is an apocalyptic number.

16400400280555 is a deficient number, since it is larger than the sum of its proper divisors (3461102004245).

16400400280555 is a wasteful number, since it uses less digits than its factorization.

16400400280555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707814.

The product of its (nonzero) digits is 192000, while the sum is 40.

The spelling of 16400400280555 in words is "sixteen trillion, four hundred billion, four hundred million, two hundred eighty thousand, five hundred fifty-five".