19550126554 has 16 divisors (see below), whose sum is σ = 33516475776. Its totient is φ = 8378132400.

The previous prime is 19550126501. The next prime is 19550126581. The reversal of 19550126554 is 45562105591.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19550126554.

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, 306619 + ... + 364849.

It is an arithmetic number, because the mean of its divisors is an integer number (2094779736).

Almost surely, 2^19550126554 is an apocalyptic number.

19550126554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19550126554 is a deficient number, since it is larger than the sum of its proper divisors (13966349222).

19550126554 is a wasteful number, since it uses less digits than its factorization.

19550126554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82221.

The product of its (nonzero) digits is 270000, while the sum is 43.

The spelling of 19550126554 in words is "nineteen billion, five hundred fifty million, one hundred twenty-six thousand, five hundred fifty-four".