11278521145 has 16 divisors (see below), whose sum is σ = 13845904128. Its totient is φ = 8815690240.

The previous prime is 11278521101. The next prime is 11278521187. The reversal of 11278521145 is 54112587211.

It is not a de Polignac number, because 11278521145 - 2¹¹ = 11278519097 is a prime.

It is a super-2 number, since 2×11278521145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97065 + ... + 178825.

It is an arithmetic number, because the mean of its divisors is an integer number (865369008).

Almost surely, 2^11278521145 is an apocalyptic number.

It is an amenable number.

11278521145 is a deficient number, since it is larger than the sum of its proper divisors (2567382983).

11278521145 is an equidigital number, since it uses as much as digits as its factorization.

11278521145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82400.

The product of its digits is 22400, while the sum is 37.

The spelling of 11278521145 in words is "eleven billion, two hundred seventy-eight million, five hundred twenty-one thousand, one hundred forty-five".