1647332161272 has 96 divisors (see below), whose sum is σ = 5127370934400. Its totient is φ = 468036885312.

The previous prime is 1647332161259. The next prime is 1647332161361. The reversal of 1647332161272 is 2721612337461.

It is a happy number.

1647332161272 is a `hidden beast` number, since 1 + 6 + 4 + 7 + 3 + 3 + 21 + 612 + 7 + 2 = 666.

It is a super-2 number, since 2×1647332161272² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9039718 + ... + 9220149.

It is an arithmetic number, because the mean of its divisors is an integer number (53410113900).

Almost surely, 2^{1647332161272} is an apocalyptic number.

1647332161272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1647332161272 is an abundant number, since it is smaller than the sum of its proper divisors (3480038773128).

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

1647332161272 is a wasteful number, since it uses less digits than its factorization.

1647332161272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18260065 (or 18260058 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The spelling of 1647332161272 in words is "one trillion, six hundred forty-seven billion, three hundred thirty-two million, one hundred sixty-one thousand, two hundred seventy-two".