11503254078 has 12 divisors (see below), whose sum is σ = 24923717208. Its totient is φ = 3834418020.

The previous prime is 11503254071. The next prime is 11503254097. The reversal of 11503254078 is 87045230511.

11503254078 is a `hidden beast` number, since 1 + 15 + 0 + 32 + 540 + 78 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503254071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 319534818 + ... + 319534853.

It is an arithmetic number, because the mean of its divisors is an integer number (2076976434).

Almost surely, 2^11503254078 is an apocalyptic number.

11503254078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11503254078 is an abundant number, since it is smaller than the sum of its proper divisors (13420463130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11503254078 is a wasteful number, since it uses less digits than its factorization.

11503254078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639069679 (or 639069676 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

Adding to 11503254078 its reverse (87045230511), we get a palindrome (98548484589).

The spelling of 11503254078 in words is "eleven billion, five hundred three million, two hundred fifty-four thousand, seventy-eight".