11551787340 has 48 divisors (see below), whose sum is σ = 32409393408. Its totient is φ = 3074344384.

The previous prime is 11551787311. The next prime is 11551787347. The reversal of 11551787340 is 4378715511.

It is a junction number, because it is equal to n+sod(n) for n = 11551787292 and 11551787301.

It is not an unprimeable number, because it can be changed into a prime (11551787347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161202 + ... + 221561.

It is an arithmetic number, because the mean of its divisors is an integer number (675195696).

Almost surely, 2^11551787340 is an apocalyptic number.

11551787340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11551787340 is an abundant number, since it is smaller than the sum of its proper divisors (20857606068).

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

11551787340 is a wasteful number, since it uses less digits than its factorization.

11551787340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383278 (or 383276 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 42.

The spelling of 11551787340 in words is "eleven billion, five hundred fifty-one million, seven hundred eighty-seven thousand, three hundred forty".