16400020567877 has 16 divisors (see below), whose sum is σ = 16848124625280. Its totient is φ = 15957740498112.

The previous prime is 16400020567873. The next prime is 16400020567897. The reversal of 16400020567877 is 77876502000461.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16400020567877 - 2² = 16400020567873 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400020567871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11818823 + ... + 13133339.

It is an arithmetic number, because the mean of its divisors is an integer number (1053007789080).

Almost surely, 2^{16400020567877} is an apocalyptic number.

It is an amenable number.

16400020567877 is a deficient number, since it is larger than the sum of its proper divisors (448104057403).

16400020567877 is a wasteful number, since it uses less digits than its factorization.

16400020567877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316732.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 16400020567877 in words is "sixteen trillion, four hundred billion, twenty million, five hundred sixty-seven thousand, eight hundred seventy-seven".