11601601625 has 8 divisors (see below), whose sum is σ = 14478798984. Its totient is φ = 9281281200.

The previous prime is 11601601621. The next prime is 11601601657. The reversal of 11601601625 is 52610610611.

It can be written as a sum of positive squares in 4 ways, for example, as 5973136 + 11595628489 = 2444^2 + 107683^2 .

It is not a de Polignac number, because 11601601625 - 2² = 11601601621 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11601601621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46406282 + ... + 46406531.

It is an arithmetic number, because the mean of its divisors is an integer number (1809849873).

Almost surely, 2^11601601625 is an apocalyptic number.

It is an amenable number.

11601601625 is a deficient number, since it is larger than the sum of its proper divisors (2877197359).

11601601625 is an frugal number, since it uses more digits than its factorization.

11601601625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92812828 (or 92812818 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 11601601625 in words is "eleven billion, six hundred one million, six hundred one thousand, six hundred twenty-five".