1649269207872 has 2016 divisors, whose sum is σ = 6360658734080. Its totient is φ = 415499673600.

The previous prime is 1649269207853. The next prime is 1649269207879. The reversal of 1649269207872 is 2787029629461.

1649269207872 is a `hidden beast` number, since 1 + 6 + 492 + 6 + 9 + 2 + 0 + 78 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649269207879) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 44574843438 + ... + 44574843474.

Almost surely, 2^{1649269207872} is an apocalyptic number.

1649269207872 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 1649269207872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3180329367040).

1649269207872 is an abundant number, since it is smaller than the sum of its proper divisors (4711389526208).

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

1649269207872 is a wasteful number, since it uses less digits than its factorization.

1649269207872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 1649269207872 in words is "one trillion, six hundred forty-nine billion, two hundred sixty-nine million, two hundred seven thousand, eight hundred seventy-two".