11954805559 has 16 divisors (see below), whose sum is σ = 12560584960. Its totient is φ = 11363328000.

The previous prime is 11954805481. The next prime is 11954805563. The reversal of 11954805559 is 95550845911.

It is a cyclic number.

It is not a de Polignac number, because 11954805559 - 2¹³ = 11954797367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11954805859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1450069 + ... + 1458289.

It is an arithmetic number, because the mean of its divisors is an integer number (785036560).

Almost surely, 2^11954805559 is an apocalyptic number.

11954805559 is a deficient number, since it is larger than the sum of its proper divisors (605779401).

11954805559 is an equidigital number, since it uses as much as digits as its factorization.

11954805559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082.

The product of its (nonzero) digits is 1620000, while the sum is 52.

The spelling of 11954805559 in words is "eleven billion, nine hundred fifty-four million, eight hundred five thousand, five hundred fifty-nine".