11777778971 has 8 divisors (see below), whose sum is σ = 13461147360. Its totient is φ = 10094617728.

The previous prime is 11777778967. The next prime is 11777778979. The reversal of 11777778971 is 17987777711.

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

It is a cyclic number.

It is not a de Polignac number, because 11777778971 - 2² = 11777778967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11777778979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99545 + ... + 182933.

It is an arithmetic number, because the mean of its divisors is an integer number (1682643420).

Almost surely, 2^11777778971 is an apocalyptic number.

11777778971 is a deficient number, since it is larger than the sum of its proper divisors (1683368389).

11777778971 is an equidigital number, since it uses as much as digits as its factorization.

11777778971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103573.

The product of its digits is 8470728, while the sum is 62.

The spelling of 11777778971 in words is "eleven billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, nine hundred seventy-one".