55100463640 has 128 divisors (see below), whose sum is σ = 128520043200. Its totient is φ = 21244723200.

The previous prime is 55100463569. The next prime is 55100463643. The reversal of 55100463640 is 4636400155.

It is a super-2 number, since 2×55100463640² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55100463596 and 55100463605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55100463643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134719756 + ... + 134720164.

Almost surely, 2^55100463640 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 55100463640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64260021600).

55100463640 is an abundant number, since it is smaller than the sum of its proper divisors (73419579560).

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

55100463640 is a wasteful number, since it uses less digits than its factorization.

55100463640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 55100463640 its reverse (4636400155), we get a palindrome (59736863795).

The spelling of 55100463640 in words is "fifty-five billion, one hundred million, four hundred sixty-three thousand, six hundred forty".