1781467404912 has 360 divisors, whose sum is σ = 5616195207168. Its totient is φ = 546421075200.

The previous prime is 1781467404887. The next prime is 1781467404961. The reversal of 1781467404912 is 2194047641871.

1781467404912 is a `hidden beast` number, since 1 + 7 + 8 + 146 + 7 + 4 + 0 + 491 + 2 = 666.

It is a super-2 number, since 2×1781467404912² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 217486737 + ... + 217494927.

Almost surely, 2^{1781467404912} is an apocalyptic number.

1781467404912 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 1781467404912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2808097603584).

1781467404912 is an abundant number, since it is smaller than the sum of its proper divisors (3834727802256).

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

1781467404912 is a wasteful number, since it uses less digits than its factorization.

1781467404912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8571 (or 8540 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 1781467404912 in words is "one trillion, seven hundred eighty-one billion, four hundred sixty-seven million, four hundred four thousand, nine hundred twelve".