16201778041 has 16 divisors (see below), whose sum is σ = 16719685056. Its totient is φ = 15688282176.

The previous prime is 16201778027. The next prime is 16201778077. The reversal of 16201778041 is 14087710261.

It is a cyclic number.

It is not a de Polignac number, because 16201778041 - 2¹³ = 16201769849 is a prime.

It is a super-2 number, since 2×16201778041² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16201778011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9718290 + ... + 9719956.

It is an arithmetic number, because the mean of its divisors is an integer number (1044980316).

Almost surely, 2^16201778041 is an apocalyptic number.

It is an amenable number.

16201778041 is a deficient number, since it is larger than the sum of its proper divisors (517907015).

16201778041 is a wasteful number, since it uses less digits than its factorization.

16201778041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808.

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 16201778041 in words is "sixteen billion, two hundred one million, seven hundred seventy-eight thousand, forty-one".