11601555007 has 4 divisors (see below), whose sum is σ = 13258920016. Its totient is φ = 9944190000.

The previous prime is 11601555001. The next prime is 11601555019. The reversal of 11601555007 is 70055510611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11601555007 - 2³ = 11601554999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11601555007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11601555001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828682494 + ... + 828682507.

It is an arithmetic number, because the mean of its divisors is an integer number (3314730004).

Almost surely, 2^11601555007 is an apocalyptic number.

11601555007 is a deficient number, since it is larger than the sum of its proper divisors (1657365009).

11601555007 is an equidigital number, since it uses as much as digits as its factorization.

11601555007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657365008.

The product of its (nonzero) digits is 5250, while the sum is 31.

The spelling of 11601555007 in words is "eleven billion, six hundred one million, five hundred fifty-five thousand, seven".