55513205040 has 80 divisors (see below), whose sum is σ = 172156981248. Its totient is φ = 14797840128.

The previous prime is 55513205029. The next prime is 55513205057. The reversal of 55513205040 is 4050231555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55513204989 and 55513205007.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601839 + ... + 687921.

Almost surely, 2^55513205040 is an apocalyptic number.

It is an amenable number.

55513205040 is an abundant number, since it is smaller than the sum of its proper divisors (116643776208).

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

55513205040 is a wasteful number, since it uses less digits than its factorization.

55513205040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88786 (or 88780 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

Adding to 55513205040 its reverse (4050231555), we get a palindrome (59563436595).

The spelling of 55513205040 in words is "fifty-five billion, five hundred thirteen million, two hundred five thousand, forty".