11212878464 has 16 divisors (see below), whose sum is σ = 22338156570. Its totient is φ = 5606439168.

The previous prime is 11212878463. The next prime is 11212878473. The reversal of 11212878464 is 46487821211.

It can be written as a sum of positive squares in only one way, i.e., 10817664064 + 395214400 = 104008^2 + 19880^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (11212878461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43800179 + ... + 43800434.

Almost surely, 2^11212878464 is an apocalyptic number.

It is an amenable number.

11212878464 is a deficient number, since it is larger than the sum of its proper divisors (11125278106).

11212878464 is an frugal number, since it uses more digits than its factorization.

11212878464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87600627 (or 87600615 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The spelling of 11212878464 in words is "eleven billion, two hundred twelve million, eight hundred seventy-eight thousand, four hundred sixty-four".