16612572001 has 4 divisors (see below), whose sum is σ = 16613034004. Its totient is φ = 16612110000.

The previous prime is 16612571981. The next prime is 16612572017. The reversal of 16612572001 is 10027521661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1616120401 + 14996451600 = 40201^2 + 122460^2 .

It is a cyclic number.

It is not a de Polignac number, because 16612572001 - 2⁹ = 16612571489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16612572071) 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, 172050 + ... + 250651.

It is an arithmetic number, because the mean of its divisors is an integer number (4153258501).

Almost surely, 2^16612572001 is an apocalyptic number.

It is an amenable number.

16612572001 is a deficient number, since it is larger than the sum of its proper divisors (462003).

16612572001 is an equidigital number, since it uses as much as digits as its factorization.

16612572001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462002.

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 16612572001 in words is "sixteen billion, six hundred twelve million, five hundred seventy-two thousand, one".