16451435164401 has 24 divisors (see below), whose sum is σ = 24054190954560. Its totient is φ = 10834124148000.

The previous prime is 16451435164387. The next prime is 16451435164511. The reversal of 16451435164401 is 10446153415461.

16451435164401 is a `hidden beast` number, since 1 + 6 + 4 + 51 + 4 + 35 + 164 + 401 = 666.

It is not a de Polignac number, because 16451435164401 - 2²² = 16451430970097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16451435166401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33571110 + ... + 34057631.

It is an arithmetic number, because the mean of its divisors is an integer number (1002257956440).

Almost surely, 2^{16451435164401} is an apocalyptic number.

It is an amenable number.

16451435164401 is a deficient number, since it is larger than the sum of its proper divisors (7602755790159).

16451435164401 is a wasteful number, since it uses less digits than its factorization.

16451435164401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67629077 (or 67629074 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

Adding to 16451435164401 its reverse (10446153415461), we get a palindrome (26897588579862).

The spelling of 16451435164401 in words is "sixteen trillion, four hundred fifty-one billion, four hundred thirty-five million, one hundred sixty-four thousand, four hundred one".