11205615172 has 24 divisors (see below), whose sum is σ = 19757509632. Its totient is φ = 5560680000.

The previous prime is 11205615163. The next prime is 11205615217. The reversal of 11205615172 is 27151650211.

It is a super-2 number, since 2×11205615172² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712797 + ... + 728347.

It is an arithmetic number, because the mean of its divisors is an integer number (823229568).

Almost surely, 2^11205615172 is an apocalyptic number.

It is an amenable number.

11205615172 is a deficient number, since it is larger than the sum of its proper divisors (8551894460).

11205615172 is a wasteful number, since it uses less digits than its factorization.

11205615172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16899 (or 16897 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 11205615172 in words is "eleven billion, two hundred five million, six hundred fifteen thousand, one hundred seventy-two".