55120702505 has 64 divisors (see below), whose sum is σ = 78506184960. Its totient is φ = 36704256000.

The previous prime is 55120702501. The next prime is 55120702519. The reversal of 55120702505 is 50520702155.

55120702505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55120702505 - 2² = 55120702501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55120702501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5345855 + ... + 5356155.

It is an arithmetic number, because the mean of its divisors is an integer number (1226659140).

Almost surely, 2^55120702505 is an apocalyptic number.

55120702505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55120702505 is a deficient number, since it is larger than the sum of its proper divisors (23385482455).

55120702505 is a wasteful number, since it uses less digits than its factorization.

55120702505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490.

The product of its (nonzero) digits is 17500, while the sum is 32.

The spelling of 55120702505 in words is "fifty-five billion, one hundred twenty million, seven hundred two thousand, five hundred five".