1601091902601 has 6 divisors (see below), whose sum is σ = 2312688303770. Its totient is φ = 1067394601728.

The previous prime is 1601091902539. The next prime is 1601091902639. The reversal of 1601091902601 is 1062091901061.

It can be written as a sum of positive squares in only one way, i.e., 850546907001 + 750544995600 = 922251^2 + 866340^2 .

It is not a de Polignac number, because 1601091902601 - 2⁹ = 1601091902089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1601091902671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88949550136 + ... + 88949550153.

Almost surely, 2^{1601091902601} is an apocalyptic number.

It is an amenable number.

1601091902601 is a deficient number, since it is larger than the sum of its proper divisors (711596401169).

1601091902601 is a wasteful number, since it uses less digits than its factorization.

1601091902601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177899100295 (or 177899100292 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 1601091902601 in words is "one trillion, six hundred one billion, ninety-one million, nine hundred two thousand, six hundred one".