1606557888001 has 4 divisors (see below), whose sum is σ = 1752608605104. Its totient is φ = 1460507170900.

The previous prime is 1606557887999. The next prime is 1606557888049. The reversal of 1606557888001 is 1008887556061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1606557888001 - 2¹ = 1606557887999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606557888071) 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, 73025358535 + ... + 73025358556.

It is an arithmetic number, because the mean of its divisors is an integer number (438152151276).

Almost surely, 2^{1606557888001} is an apocalyptic number.

1606557888001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1606557888001 is a deficient number, since it is larger than the sum of its proper divisors (146050717103).

1606557888001 is a wasteful number, since it uses less digits than its factorization.

1606557888001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146050717102.

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 1606557888001 in words is "one trillion, six hundred six billion, five hundred fifty-seven million, eight hundred eighty-eight thousand, one".