55631780370540 has 576 divisors, whose sum is σ = 197378343751680. Its totient is φ = 13030834176000.

The previous prime is 55631780370527. The next prime is 55631780370563. The reversal of 55631780370540 is 4507308713655.

55631780370540 is a `hidden beast` number, since 5 + 5 + 6 + 3 + 17 + 80 + 3 + 7 + 0 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 1062277476 + ... + 1062329844.

It is an arithmetic number, because the mean of its divisors is an integer number (342670735680).

Almost surely, 2^{55631780370540} 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 55631780370540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98689171875840).

55631780370540 is an abundant number, since it is smaller than the sum of its proper divisors (141746563381140).

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

55631780370540 is a wasteful number, since it uses less digits than its factorization.

55631780370540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53076 (or 53062 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 54.

The spelling of 55631780370540 in words is "fifty-five trillion, six hundred thirty-one billion, seven hundred eighty million, three hundred seventy thousand, five hundred forty".