11641108721 has 8 divisors (see below), whose sum is σ = 13009133088. Its totient is φ = 10324708000.

The previous prime is 11641108691. The next prime is 11641108777. The reversal of 11641108721 is 12780114611.

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 11641108721 - 2²² = 11636914417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11641108321) 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, 12905435 + ... + 12906336.

It is an arithmetic number, because the mean of its divisors is an integer number (1626141636).

Almost surely, 2^11641108721 is an apocalyptic number.

11641108721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11641108721 is a deficient number, since it is larger than the sum of its proper divisors (1368024367).

11641108721 is a wasteful number, since it uses less digits than its factorization.

11641108721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25811823.

The product of its (nonzero) digits is 2688, while the sum is 32.

The spelling of 11641108721 in words is "eleven billion, six hundred forty-one million, one hundred eight thousand, seven hundred twenty-one".