1181661471000 has 192 divisors, whose sum is σ = 4204227736800. Its totient is φ = 298524960000.

The previous prime is 1181661470933. The next prime is 1181661471017. The reversal of 1181661471000 is 1741661811.

1181661471000 is a `hidden beast` number, since 1 + 18 + 16 + 614 + 7 + 10 + 0 + 0 = 666.

It is a super-3 number, since 3×1181661471000³ (a number of 37 digits) contains 333 as substring.

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

It is a congruent number.

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, 3284151 + ... + 3626150.

Almost surely, 2^{1181661471000} is an apocalyptic number.

1181661471000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181661471000 is an abundant number, since it is smaller than the sum of its proper divisors (3022566265800).

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

1181661471000 is a wasteful number, since it uses less digits than its factorization.

1181661471000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910347 (or 6910330 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 1181661471000 in words is "one trillion, one hundred eighty-one billion, six hundred sixty-one million, four hundred seventy-one thousand".