11504655681 has 8 divisors (see below), whose sum is σ = 15394919424. Its totient is φ = 7642081200.

The previous prime is 11504655671. The next prime is 11504655689. The reversal of 11504655681 is 18655640511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11504655681 - 2¹³ = 11504647489 is a prime.

It is a super-2 number, since 2×11504655681² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11504655689) 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, 6921345 + ... + 6923006.

It is an arithmetic number, because the mean of its divisors is an integer number (1924364928).

Almost surely, 2^11504655681 is an apocalyptic number.

It is an amenable number.

11504655681 is a deficient number, since it is larger than the sum of its proper divisors (3890263743).

11504655681 is a wasteful number, since it uses less digits than its factorization.

11504655681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13844631.

The product of its (nonzero) digits is 144000, while the sum is 42.

The spelling of 11504655681 in words is "eleven billion, five hundred four million, six hundred fifty-five thousand, six hundred eighty-one".