11541603780 has 144 divisors (see below), whose sum is σ = 41750601984. Its totient is φ = 2523375360.

The previous prime is 11541603767. The next prime is 11541603797. The reversal of 11541603780 is 8730614511.

11541603780 is a `hidden beast` number, since 1 + 1 + 5 + 41 + 603 + 7 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170151 + ... + 228110.

It is an arithmetic number, because the mean of its divisors is an integer number (289934736).

Almost surely, 2^11541603780 is an apocalyptic number.

11541603780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11541603780 is an abundant number, since it is smaller than the sum of its proper divisors (30208998204).

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

11541603780 is a wasteful number, since it uses less digits than its factorization.

11541603780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398306 (or 398301 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 11541603780 in words is "eleven billion, five hundred forty-one million, six hundred three thousand, seven hundred eighty".