55135423420 has 48 divisors (see below), whose sum is σ = 144354567168. Its totient is φ = 17185066560.

The previous prime is 55135423403. The next prime is 55135423433. The reversal of 55135423420 is 2432453155.

It is a congruent number.

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, 17899572 + ... + 17902651.

It is an arithmetic number, because the mean of its divisors is an integer number (3007386816).

Almost surely, 2^55135423420 is an apocalyptic number.

It is an amenable number.

55135423420 is an abundant number, since it is smaller than the sum of its proper divisors (89219143748).

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

55135423420 is a wasteful number, since it uses less digits than its factorization.

55135423420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35802250 (or 35802248 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 55135423420 its reverse (2432453155), we get a palindrome (57567876575).

The spelling of 55135423420 in words is "fifty-five billion, one hundred thirty-five million, four hundred twenty-three thousand, four hundred twenty".