55661110140 has 24 divisors (see below), whose sum is σ = 155851108560. Its totient is φ = 14842962688.

The previous prime is 55661110139. The next prime is 55661110151. The reversal of 55661110140 is 4101116655.

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 = 55661110098 and 55661110107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463842525 + ... + 463842644.

It is an arithmetic number, because the mean of its divisors is an integer number (6493796190).

Almost surely, 2^55661110140 is an apocalyptic number.

It is an amenable number.

55661110140 is an abundant number, since it is smaller than the sum of its proper divisors (100189998420).

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

55661110140 is a wasteful number, since it uses less digits than its factorization.

55661110140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927685181 (or 927685179 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 55661110140 its reverse (4101116655), we get a palindrome (59762226795).

The spelling of 55661110140 in words is "fifty-five billion, six hundred sixty-one million, one hundred ten thousand, one hundred forty".