11612661280 has 48 divisors (see below), whose sum is σ = 29928999744. Its totient is φ = 4222785280.

The previous prime is 11612661271. The next prime is 11612661311. The reversal of 11612661280 is 8216621611.

It is a super-2 number, since 2×11612661280² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3297292 + ... + 3300811.

It is an arithmetic number, because the mean of its divisors is an integer number (623520828).

Almost surely, 2^11612661280 is an apocalyptic number.

11612661280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11612661280 is an abundant number, since it is smaller than the sum of its proper divisors (18316338464).

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

11612661280 is a wasteful number, since it uses less digits than its factorization.

11612661280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6598129 (or 6598121 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 11612661280 in words is "eleven billion, six hundred twelve million, six hundred sixty-one thousand, two hundred eighty".