11661436625 has 32 divisors (see below), whose sum is σ = 15075680256. Its totient is φ = 8996520000.

The previous prime is 11661436547. The next prime is 11661436627. The reversal of 11661436625 is 52663416611.

It is not a de Polignac number, because 11661436625 - 2¹² = 11661432529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11661436627) 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, 1130240 + ... + 1140510.

It is an arithmetic number, because the mean of its divisors is an integer number (471115008).

Almost surely, 2^11661436625 is an apocalyptic number.

It is an amenable number.

11661436625 is a deficient number, since it is larger than the sum of its proper divisors (3414243631).

11661436625 is a wasteful number, since it uses less digits than its factorization.

11661436625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610 (or 10600 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The spelling of 11661436625 in words is "eleven billion, six hundred sixty-one million, four hundred thirty-six thousand, six hundred twenty-five".