11911011572 has 12 divisors (see below), whose sum is σ = 20846241696. Its totient is φ = 5954942520.

The previous prime is 11911011559. The next prime is 11911011583. The reversal of 11911011572 is 27511011911.

It is a super-2 number, since 2×11911011572² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91304 + ... + 179327.

It is an arithmetic number, because the mean of its divisors is an integer number (1737186808).

Almost surely, 2^11911011572 is an apocalyptic number.

It is an amenable number.

11911011572 is a deficient number, since it is larger than the sum of its proper divisors (8935230124).

11911011572 is a wasteful number, since it uses less digits than its factorization.

11911011572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281638 (or 281636 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 29.

The spelling of 11911011572 in words is "eleven billion, nine hundred eleven million, eleven thousand, five hundred seventy-two".