16204887360781 has 16 divisors (see below), whose sum is σ = 18971808363648. Its totient is φ = 13550958950400.

The previous prime is 16204887360751. The next prime is 16204887360793. The reversal of 16204887360781 is 18706378840261.

It is a cyclic number.

It is not a de Polignac number, because 16204887360781 - 2⁵ = 16204887360749 is a prime.

It is a super-2 number, since 2×16204887360781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16204887360751) 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, 26756886 + ... + 27355816.

It is an arithmetic number, because the mean of its divisors is an integer number (1185738022728).

Almost surely, 2^{16204887360781} is an apocalyptic number.

It is an amenable number.

16204887360781 is a deficient number, since it is larger than the sum of its proper divisors (2766921002867).

16204887360781 is an equidigital number, since it uses as much as digits as its factorization.

16204887360781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693252.

The product of its (nonzero) digits is 21676032, while the sum is 61.

The spelling of 16204887360781 in words is "sixteen trillion, two hundred four billion, eight hundred eighty-seven million, three hundred sixty thousand, seven hundred eighty-one".