55123364442 has 16 divisors (see below), whose sum is σ = 110260202400. Its totient is φ = 18372209232.

The previous prime is 55123364419. The next prime is 55123364473. The reversal of 55123364442 is 24446332155.

It is a self number, because there is not a number n which added to its sum of digits gives 55123364442.

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, 507817 + ... + 606732.

It is an arithmetic number, because the mean of its divisors is an integer number (6891262650).

Almost surely, 2^55123364442 is an apocalyptic number.

55123364442 is an abundant number, since it is smaller than the sum of its proper divisors (55136837958).

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

55123364442 is a wasteful number, since it uses less digits than its factorization.

55123364442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122797.

The product of its digits is 345600, while the sum is 39.

Adding to 55123364442 its reverse (24446332155), we get a palindrome (79569696597).

The spelling of 55123364442 in words is "fifty-five billion, one hundred twenty-three million, three hundred sixty-four thousand, four hundred forty-two".