1659278001601 has 32 divisors (see below), whose sum is σ = 1879379542656. Its totient is φ = 1451830272000.

The previous prime is 1659278001547. The next prime is 1659278001631. The reversal of 1659278001601 is 1061008729561.

It is not a de Polignac number, because 1659278001601 - 2⁹ = 1659278001089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1659278001631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11558601 + ... + 11701273.

It is an arithmetic number, because the mean of its divisors is an integer number (58730610708).

Almost surely, 2^{1659278001601} is an apocalyptic number.

1659278001601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1659278001601 is a deficient number, since it is larger than the sum of its proper divisors (220101541055).

1659278001601 is a wasteful number, since it uses less digits than its factorization.

1659278001601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143073.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 1659278001601 in words is "one trillion, six hundred fifty-nine billion, two hundred seventy-eight million, one thousand, six hundred one".