1551643472412 has 432 divisors, whose sum is σ = 4759566136416. Its totient is φ = 440134041600.

The previous prime is 1551643472383. The next prime is 1551643472413. The reversal of 1551643472412 is 2142743461551.

It is a happy number.

1551643472412 is a `hidden beast` number, since 1 + 5 + 5 + 1 + 64 + 347 + 241 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1551643472413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 385882962 + ... + 385886982.

Almost surely, 2^{1551643472412} is an apocalyptic number.

1551643472412 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 1551643472412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2379783068208).

1551643472412 is an abundant number, since it is smaller than the sum of its proper divisors (3207922664004).

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

1551643472412 is a wasteful number, since it uses less digits than its factorization.

1551643472412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272 (or 4247 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 1551643472412 in words is "one trillion, five hundred fifty-one billion, six hundred forty-three million, four hundred seventy-two thousand, four hundred twelve".