16040166543400 has 24 divisors (see below), whose sum is σ = 37293387213870. Its totient is φ = 6416066617280.

The previous prime is 16040166543371. The next prime is 16040166543407. The reversal of 16040166543400 is 434566104061.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11360014093444 + 4680152449956 = 3370462^2 + 2163366^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (16040166543407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40100416159 + ... + 40100416558.

Almost surely, 2^{16040166543400} is an apocalyptic number.

16040166543400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16040166543400 is an abundant number, since it is smaller than the sum of its proper divisors (21253220670470).

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

16040166543400 is a wasteful number, since it uses less digits than its factorization.

16040166543400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80200832733 (or 80200832724 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 16040166543400 in words is "sixteen trillion, forty billion, one hundred sixty-six million, five hundred forty-three thousand, four hundred".