11778511850 has 48 divisors (see below), whose sum is σ = 25271828928. Its totient is φ = 4000592640.

The previous prime is 11778511847. The next prime is 11778511861. The reversal of 11778511850 is 5811587711.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119807 + ... + 194706.

It is an arithmetic number, because the mean of its divisors is an integer number (526496436).

Almost surely, 2^11778511850 is an apocalyptic number.

11778511850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11778511850 is an abundant number, since it is smaller than the sum of its proper divisors (13493317078).

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

11778511850 is a wasteful number, since it uses less digits than its factorization.

11778511850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314639 (or 314634 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 44.

The spelling of 11778511850 in words is "eleven billion, seven hundred seventy-eight million, five hundred eleven thousand, eight hundred fifty".