55651265620 has 192 divisors, whose sum is σ = 134718232320. Its totient is φ = 19175989248.

The previous prime is 55651265573. The next prime is 55651265629. The reversal of 55651265620 is 2656215655.

55651265620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55651265629) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 37525399 + ... + 37526881.

It is an arithmetic number, because the mean of its divisors is an integer number (701657460).

Almost surely, 2^55651265620 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 55651265620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67359116160).

55651265620 is an abundant number, since it is smaller than the sum of its proper divisors (79066966700).

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

55651265620 is a wasteful number, since it uses less digits than its factorization.

55651265620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722 (or 1720 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The spelling of 55651265620 in words is "fifty-five billion, six hundred fifty-one million, two hundred sixty-five thousand, six hundred twenty".