16567172401 has 8 divisors (see below), whose sum is σ = 18891074664. Its totient is φ = 14393199360.

The previous prime is 16567172383. The next prime is 16567172411. The reversal of 16567172401 is 10427176561.

It can be written as a sum of positive squares in 4 ways, for example, as 151413025 + 16415759376 = 12305^2 + 128124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16567172401 - 2⁷ = 16567172273 is a prime.

It is a super-2 number, since 2×16567172401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16567172411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37482070 + ... + 37482511.

It is an arithmetic number, because the mean of its divisors is an integer number (2361384333).

Almost surely, 2^16567172401 is an apocalyptic number.

It is an amenable number.

16567172401 is a deficient number, since it is larger than the sum of its proper divisors (2323902263).

16567172401 is a wasteful number, since it uses less digits than its factorization.

16567172401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74964611.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 16567172401 in words is "sixteen billion, five hundred sixty-seven million, one hundred seventy-two thousand, four hundred one".