55977751019520 has 1360 divisors, whose sum is σ = 230479189015680. Its totient is φ = 12854860185600.

The previous prime is 55977751019471. The next prime is 55977751019521. The reversal of 55977751019520 is 2591015777955.

55977751019520 is a `hidden beast` number, since 5 + 5 + 9 + 7 + 7 + 7 + 510 + 1 + 95 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55977751019521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5547289675 + ... + 5547299765.

Almost surely, 2^{55977751019520} 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 55977751019520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115239594507840).

55977751019520 is an abundant number, since it is smaller than the sum of its proper divisors (174501437996160).

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

55977751019520 is a wasteful number, since it uses less digits than its factorization.

55977751019520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170 (or 10131 counting only the distinct ones).

The product of its (nonzero) digits is 34728750, while the sum is 63.

The spelling of 55977751019520 in words is "fifty-five trillion, nine hundred seventy-seven billion, seven hundred fifty-one million, nineteen thousand, five hundred twenty".