1945139387707 has 4 divisors (see below), whose sum is σ = 1952317024096. Its totient is φ = 1937961751320.

The previous prime is 1945139387699. The next prime is 1945139387713. The reversal of 1945139387707 is 7077839315491.

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

It is a cyclic number.

It is not a de Polignac number, because 1945139387707 - 2³ = 1945139387699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1945139387207) 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, 3588817788 + ... + 3588818329.

It is an arithmetic number, because the mean of its divisors is an integer number (488079256024).

Almost surely, 2^{1945139387707} is an apocalyptic number.

1945139387707 is a deficient number, since it is larger than the sum of its proper divisors (7177636389).

1945139387707 is an equidigital number, since it uses as much as digits as its factorization.

1945139387707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177636388.

The product of its (nonzero) digits is 40007520, while the sum is 64.

The spelling of 1945139387707 in words is "one trillion, nine hundred forty-five billion, one hundred thirty-nine million, three hundred eighty-seven thousand, seven hundred seven".