1851180663672 has 192 divisors, whose sum is σ = 5343334944480. Its totient is φ = 576960454656.

The previous prime is 1851180663641. The next prime is 1851180663679. The reversal of 1851180663672 is 2763660811581.

It is a happy number.

1851180663672 is a `hidden beast` number, since 1 + 8 + 511 + 8 + 0 + 6 + 63 + 67 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851180663679) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 371198763 + ... + 371203749.

Almost surely, 2^{1851180663672} is an apocalyptic number.

1851180663672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851180663672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2671667472240).

1851180663672 is an abundant number, since it is smaller than the sum of its proper divisors (3492154280808).

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

1851180663672 is a wasteful number, since it uses less digits than its factorization.

1851180663672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 1851180663672 in words is "one trillion, eight hundred fifty-one billion, one hundred eighty million, six hundred sixty-three thousand, six hundred seventy-two".