11721259078 has 4 divisors (see below), whose sum is σ = 17581888620. Its totient is φ = 5860629538.

The previous prime is 11721259073. The next prime is 11721259097. The reversal of 11721259078 is 87095212711.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11721259073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2930314768 + ... + 2930314771.

It is an arithmetic number, because the mean of its divisors is an integer number (4395472155).

Almost surely, 2^11721259078 is an apocalyptic number.

11721259078 is a deficient number, since it is larger than the sum of its proper divisors (5860629542).

11721259078 is an equidigital number, since it uses as much as digits as its factorization.

11721259078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5860629541.

The product of its (nonzero) digits is 70560, while the sum is 43.

The spelling of 11721259078 in words is "eleven billion, seven hundred twenty-one million, two hundred fifty-nine thousand, seventy-eight".