11172062778 has 32 divisors (see below), whose sum is σ = 22654066176. Its totient is φ = 3672526128.

The previous prime is 11172062777. The next prime is 11172062779. The reversal of 11172062778 is 87726027111.

It is an interprime number because it is at equal distance from previous prime (11172062777) and next prime (11172062779).

It is not an unprimeable number, because it can be changed into a prime (11172062777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260451 + ... + 300297.

It is an arithmetic number, because the mean of its divisors is an integer number (707939568).

Almost surely, 2^11172062778 is an apocalyptic number.

11172062778 is an abundant number, since it is smaller than the sum of its proper divisors (11482003398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11172062778 is a wasteful number, since it uses less digits than its factorization.

11172062778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40498.

The product of its (nonzero) digits is 65856, while the sum is 42.

Adding to 11172062778 its reverse (87726027111), we get a palindrome (98898089889).

The spelling of 11172062778 in words is "eleven billion, one hundred seventy-two million, sixty-two thousand, seven hundred seventy-eight".