11503542375 has 128 divisors (see below), whose sum is σ = 23697273600. Its totient is φ = 5467392000.

The previous prime is 11503542367. The next prime is 11503542409. The reversal of 11503542375 is 57324530511.

11503542375 is a `hidden beast` number, since 11 + 503 + 54 + 23 + 75 = 666.

It is not a de Polignac number, because 11503542375 - 2³ = 11503542367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1267855 + ... + 1276895.

It is an arithmetic number, because the mean of its divisors is an integer number (185134950).

Almost surely, 2^11503542375 is an apocalyptic number.

11503542375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11503542375 is an abundant number, since it is smaller than the sum of its proper divisors (12193731225).

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

11503542375 is a wasteful number, since it uses less digits than its factorization.

11503542375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9107 (or 9091 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

It can be divided in two parts, 11503 and 542375, that added together give a triangular number (553878 = T₁₀₅₂).

The spelling of 11503542375 in words is "eleven billion, five hundred three million, five hundred forty-two thousand, three hundred seventy-five".