55961300621040 has 160 divisors (see below), whose sum is σ = 179175636406272. Its totient is φ = 14433603840000.

The previous prime is 55961300620999. The next prime is 55961300621041. The reversal of 55961300621040 is 4012600316955.

55961300621040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 55961300620983 and 55961300621001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55961300621041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11311245 + ... + 15487635.

Almost surely, 2^{55961300621040} 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 55961300621040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89587818203136).

55961300621040 is an abundant number, since it is smaller than the sum of its proper divisors (123214335785232).

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

55961300621040 is a wasteful number, since it uses less digits than its factorization.

55961300621040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178239 (or 4178233 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

Adding to 55961300621040 its reverse (4012600316955), we get a palindrome (59973900937995).

The spelling of 55961300621040 in words is "fifty-five trillion, nine hundred sixty-one billion, three hundred million, six hundred twenty-one thousand, forty".