11278819461 has 96 divisors (see below), whose sum is σ = 19946424960. Its totient is φ = 5609350656.

The previous prime is 11278819457. The next prime is 11278819543. The reversal of 11278819461 is 16491887211.

It is not a de Polignac number, because 11278819461 - 2² = 11278819457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11278819461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11278819441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2380651 + ... + 2385383.

It is an arithmetic number, because the mean of its divisors is an integer number (207775260).

Almost surely, 2^11278819461 is an apocalyptic number.

It is an amenable number.

11278819461 is a deficient number, since it is larger than the sum of its proper divisors (8667605499).

11278819461 is a wasteful number, since it uses less digits than its factorization.

11278819461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835 (or 4828 counting only the distinct ones).

The product of its digits is 193536, while the sum is 48.

The spelling of 11278819461 in words is "eleven billion, two hundred seventy-eight million, eight hundred nineteen thousand, four hundred sixty-one".