11944420575 has 36 divisors (see below), whose sum is σ = 20978132760. Its totient is φ = 5995619840.

The previous prime is 11944420561. The next prime is 11944420591. The reversal of 11944420575 is 57502444911.

It is not a de Polignac number, because 11944420575 - 2⁷ = 11944420447 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 253860 + ... + 297209.

It is an arithmetic number, because the mean of its divisors is an integer number (582725910).

Almost surely, 2^11944420575 is an apocalyptic number.

11944420575 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11944420575 is a deficient number, since it is larger than the sum of its proper divisors (9033712185).

11944420575 is a wasteful number, since it uses less digits than its factorization.

11944420575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551116 (or 551094 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 11944420575 in words is "eleven billion, nine hundred forty-four million, four hundred twenty thousand, five hundred seventy-five".