16124572801 has 4 divisors (see below), whose sum is σ = 16124832004. Its totient is φ = 16124313600.

The previous prime is 16124572771. The next prime is 16124572829. The reversal of 16124572801 is 10827542161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10827542161 = 941 ⋅11506421.

It can be written as a sum of positive squares in 2 ways, for example, as 5655190401 + 10469382400 = 75201^2 + 102320^2 .

It is a 3-Lehmer number, since φ(16124572801) divides (16124572801-1)³.

It is a cyclic number.

It is not a de Polignac number, because 16124572801 - 2¹¹ = 16124570753 is a prime.

It is a deceptive number, since it divides R_16124572800.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16124572201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25921 + ... + 181441.

It is an arithmetic number, because the mean of its divisors is an integer number (4031208001).

Almost surely, 2^16124572801 is an apocalyptic number.

16124572801 is the 103681-st pentagonal number.

It is an amenable number.

16124572801 is a deficient number, since it is larger than the sum of its proper divisors (259203).

16124572801 is a wasteful number, since it uses less digits than its factorization.

16124572801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259202.

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 16124572801 in words is "sixteen billion, one hundred twenty-four million, five hundred seventy-two thousand, eight hundred one".