53445291648 has 64 divisors (see below), whose sum is σ = 162244643520. Its totient is φ = 15270082560.

The previous prime is 53445291593. The next prime is 53445291667. The reversal of 53445291648 is 84619254435.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 53445291648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9938773 + ... + 9944148.

It is an arithmetic number, because the mean of its divisors is an integer number (2535072555).

Almost surely, 2^53445291648 is an apocalyptic number.

It is an amenable number.

53445291648 is an abundant number, since it is smaller than the sum of its proper divisors (108799351872).

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

53445291648 is a wasteful number, since it uses less digits than its factorization.

53445291648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19882945 (or 19882933 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The spelling of 53445291648 in words is "fifty-three billion, four hundred forty-five million, two hundred ninety-one thousand, six hundred forty-eight".