1945139563127 has 4 divisors (see below), whose sum is σ = 1946502661656. Its totient is φ = 1943776464600.

The previous prime is 1945139563043. The next prime is 1945139563141. The reversal of 1945139563127 is 7213659315491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945139563127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945139563427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681547124 + ... + 681549977.

It is an arithmetic number, because the mean of its divisors is an integer number (486625665414).

Almost surely, 2^{1945139563127} is an apocalyptic number.

1945139563127 is a deficient number, since it is larger than the sum of its proper divisors (1363098529).

1945139563127 is a wasteful number, since it uses less digits than its factorization.

1945139563127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363098528.

The product of its digits is 6123600, while the sum is 56.

The spelling of 1945139563127 in words is "one trillion, nine hundred forty-five billion, one hundred thirty-nine million, five hundred sixty-three thousand, one hundred twenty-seven".