55121547040 has 48 divisors (see below), whose sum is σ = 148828180032. Its totient is φ = 18898815744.

The previous prime is 55121547001. The next prime is 55121547067. The reversal of 55121547040 is 4074512155.

It is a junction number, because it is equal to n+sod(n) for n = 55121546987 and 55121547005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24606714 + ... + 24608953.

It is an arithmetic number, because the mean of its divisors is an integer number (3100587084).

Almost surely, 2^55121547040 is an apocalyptic number.

It is an amenable number.

55121547040 is an abundant number, since it is smaller than the sum of its proper divisors (93706632992).

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

55121547040 is a wasteful number, since it uses less digits than its factorization.

55121547040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49215689 (or 49215681 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The spelling of 55121547040 in words is "fifty-five billion, one hundred twenty-one million, five hundred forty-seven thousand, forty".