19451037045128 has 64 divisors (see below), whose sum is σ = 40288501128960. Its totient is φ = 8747686089216.

The previous prime is 19451037045109. The next prime is 19451037045149. The reversal of 19451037045128 is 82154073015491.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7655501 + ... + 9874652.

It is an arithmetic number, because the mean of its divisors is an integer number (629507830140).

Almost surely, 2^{19451037045128} is an apocalyptic number.

It is an amenable number.

19451037045128 is an abundant number, since it is smaller than the sum of its proper divisors (20837464083832).

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

19451037045128 is a wasteful number, since it uses less digits than its factorization.

19451037045128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17530446 (or 17530442 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 19451037045128 in words is "nineteen trillion, four hundred fifty-one billion, thirty-seven million, forty-five thousand, one hundred twenty-eight".