11267587778 has 8 divisors (see below), whose sum is σ = 16967146572. Its totient is φ = 5611872256.

The previous prime is 11267587739. The next prime is 11267587787. The reversal of 11267587778 is 87778576211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8767887769 + 2499700009 = 93637^2 + 49997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 10960175 + ... + 10961202.

Almost surely, 2^11267587778 is an apocalyptic number.

11267587778 is a deficient number, since it is larger than the sum of its proper divisors (5699558794).

11267587778 is a wasteful number, since it uses less digits than its factorization.

11267587778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21921636.

The product of its digits is 9219840, while the sum is 59.

The spelling of 11267587778 in words is "eleven billion, two hundred sixty-seven million, five hundred eighty-seven thousand, seven hundred seventy-eight".