55903721328 has 720 divisors, whose sum is σ = 203216534976. Its totient is φ = 14213283840.

The previous prime is 55903721303. The next prime is 55903721333. The reversal of 55903721328 is 82312730955.

55903721328 is a `hidden beast` number, since 5 + 590 + 3 + 7 + 21 + 32 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 542754525 + ... + 542754627.

Almost surely, 2^55903721328 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 55903721328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101608267488).

55903721328 is an abundant number, since it is smaller than the sum of its proper divisors (147312813648).

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

55903721328 is a wasteful number, since it uses less digits than its factorization.

55903721328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 55903721328 in words is "fifty-five billion, nine hundred three million, seven hundred twenty-one thousand, three hundred twenty-eight".