2051537344644 has 96 divisors (see below), whose sum is σ = 5096104675200. Its totient is φ = 640119029760.

The previous prime is 2051537344631. The next prime is 2051537344667. The reversal of 2051537344644 is 4464437351502.

It is a junction number, because it is equal to n+sod(n) for n = 2051537344593 and 2051537344602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64076512 + ... + 64108520.

It is an arithmetic number, because the mean of its divisors is an integer number (53084423700).

Almost surely, 2^{2051537344644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051537344644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2548052337600).

2051537344644 is an abundant number, since it is smaller than the sum of its proper divisors (3044567330556).

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

2051537344644 is a wasteful number, since it uses less digits than its factorization.

2051537344644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33733 (or 33731 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 48.

The spelling of 2051537344644 in words is "two trillion, fifty-one billion, five hundred thirty-seven million, three hundred forty-four thousand, six hundred forty-four".