55651111012 has 48 divisors (see below), whose sum is σ = 117817983360. Its totient is φ = 22492495872.

The previous prime is 55651111003. The next prime is 55651111031. The reversal of 55651111012 is 21011115655.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 762013 + ... + 831844.

It is an arithmetic number, because the mean of its divisors is an integer number (2454541320).

Almost surely, 2^55651111012 is an apocalyptic number.

It is an amenable number.

55651111012 is an abundant number, since it is smaller than the sum of its proper divisors (62166872348).

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

55651111012 is a wasteful number, since it uses less digits than its factorization.

55651111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593940 (or 1593938 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 28.

Adding to 55651111012 its reverse (21011115655), we get a palindrome (76662226667).

The spelling of 55651111012 in words is "fifty-five billion, six hundred fifty-one million, one hundred eleven thousand, twelve".