55120553450 has 24 divisors (see below), whose sum is σ = 102592764000. Its totient is φ = 22033482800.

The previous prime is 55120553447. The next prime is 55120553461. The reversal of 55120553450 is 5435502155.

It is a self number, because there is not a number n which added to its sum of digits gives 55120553450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 292766 + ... + 442665.

It is an arithmetic number, because the mean of its divisors is an integer number (4274698500).

Almost surely, 2^55120553450 is an apocalyptic number.

55120553450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55120553450 is a deficient number, since it is larger than the sum of its proper divisors (47472210550).

55120553450 is a wasteful number, since it uses less digits than its factorization.

55120553450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736942 (or 736937 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 55120553450 in words is "fifty-five billion, one hundred twenty million, five hundred fifty-three thousand, four hundred fifty".