11156561610 has 32 divisors (see below), whose sum is σ = 28350793152. Its totient is φ = 2800078080.

The previous prime is 11156561599. The next prime is 11156561651. The reversal of 11156561610 is 1616565111.

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, 10937296 + ... + 10938315.

It is an arithmetic number, because the mean of its divisors is an integer number (885962286).

Almost surely, 2^11156561610 is an apocalyptic number.

11156561610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11156561610 is an abundant number, since it is smaller than the sum of its proper divisors (17194231542).

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

11156561610 is a wasteful number, since it uses less digits than its factorization.

11156561610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21875638.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 11156561610 in words is "eleven billion, one hundred fifty-six million, five hundred sixty-one thousand, six hundred ten".