19555145502 has 32 divisors (see below), whose sum is σ = 40565068704. Its totient is φ = 6279408000.

The previous prime is 19555145501. The next prime is 19555145531. The reversal of 19555145502 is 20554155591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19555145501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413649 + ... + 458492.

It is an arithmetic number, because the mean of its divisors is an integer number (1267658397).

Almost surely, 2^19555145502 is an apocalyptic number.

19555145502 is an abundant number, since it is smaller than the sum of its proper divisors (21009923202).

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

19555145502 is a wasteful number, since it uses less digits than its factorization.

19555145502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872284.

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 19555145502 in words is "nineteen billion, five hundred fifty-five million, one hundred forty-five thousand, five hundred two".