1537973747712 has 272 divisors, whose sum is σ = 4654131982080. Its totient is φ = 501723168768.

The previous prime is 1537973747683. The next prime is 1537973747771. The reversal of 1537973747712 is 2177473797351.

It is a happy number.

1537973747712 is a `hidden beast` number, since 1 + 5 + 37 + 97 + 37 + 477 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1537973747712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83155938 + ... + 83174430.

Almost surely, 2^{1537973747712} is an apocalyptic number.

1537973747712 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 1537973747712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2327065991040).

1537973747712 is an abundant number, since it is smaller than the sum of its proper divisors (3116158234368).

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

1537973747712 is an frugal number, since it uses more digits than its factorization.

1537973747712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18581 (or 18545 counting only the distinct ones).

The product of its digits is 54454680, while the sum is 63.

The spelling of 1537973747712 in words is "one trillion, five hundred thirty-seven billion, nine hundred seventy-three million, seven hundred forty-seven thousand, seven hundred twelve".