55521535400 has 48 divisors (see below), whose sum is σ = 134700084000. Its totient is φ = 21243020480.

The previous prime is 55521535343. The next prime is 55521535403. The reversal of 55521535400 is 453512555.

It is not an unprimeable number, because it can be changed into a prime (55521535403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6030350 + ... + 6039549.

It is an arithmetic number, because the mean of its divisors is an integer number (2806251750).

Almost surely, 2^55521535400 is an apocalyptic number.

55521535400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55521535400 is an abundant number, since it is smaller than the sum of its proper divisors (79178548600).

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

55521535400 is a wasteful number, since it uses less digits than its factorization.

55521535400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12069938 (or 12069929 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 55521535400 in words is "fifty-five billion, five hundred twenty-one million, five hundred thirty-five thousand, four hundred".