11620072172 has 6 divisors (see below), whose sum is σ = 20335126308. Its totient is φ = 5810036084.

The previous prime is 11620072157. The next prime is 11620072199. The reversal of 11620072172 is 27127002611.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1452509018 + ... + 1452509025.

It is an arithmetic number, because the mean of its divisors is an integer number (3389187718).

Almost surely, 2^11620072172 is an apocalyptic number.

It is an amenable number.

11620072172 is a deficient number, since it is larger than the sum of its proper divisors (8715054136).

11620072172 is a wasteful number, since it uses less digits than its factorization.

11620072172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905018047 (or 2905018045 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 11620072172 its reverse (27127002611), we get a palindrome (38747074783).

The spelling of 11620072172 in words is "eleven billion, six hundred twenty million, seventy-two thousand, one hundred seventy-two".