11865404780 has 12 divisors (see below), whose sum is σ = 24917350080. Its totient is φ = 4746161904.

The previous prime is 11865404741. The next prime is 11865404807. The reversal of 11865404780 is 8740456811.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296635100 + ... + 296635139.

It is an arithmetic number, because the mean of its divisors is an integer number (2076445840).

Almost surely, 2^11865404780 is an apocalyptic number.

11865404780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11865404780 is an abundant number, since it is smaller than the sum of its proper divisors (13051945300).

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

11865404780 is a wasteful number, since it uses less digits than its factorization.

11865404780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593270248 (or 593270246 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 11865404780 in words is "eleven billion, eight hundred sixty-five million, four hundred four thousand, seven hundred eighty".