1945139563128 has 64 divisors (see below), whose sum is σ = 4994803186560. Its totient is φ = 630789641856.

The previous prime is 1945139563043. The next prime is 1945139563141. The reversal of 1945139563128 is 8213659315491.

It is a congruent number.

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, 8701251 + ... + 8921997.

It is an arithmetic number, because the mean of its divisors is an integer number (78043799790).

Almost surely, 2^{1945139563128} is an apocalyptic number.

It is an amenable number.

1945139563128 is an abundant number, since it is smaller than the sum of its proper divisors (3049663623432).

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

1945139563128 is a wasteful number, since it uses less digits than its factorization.

1945139563128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230716 (or 230712 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 57.

The spelling of 1945139563128 in words is "one trillion, nine hundred forty-five billion, one hundred thirty-nine million, five hundred sixty-three thousand, one hundred twenty-eight".