1945991548799 has 8 divisors (see below), whose sum is σ = 2028268050432. Its totient is φ = 1864933958520.

The previous prime is 1945991548777. The next prime is 1945991548801. The reversal of 1945991548799 is 9978451995491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945991548799 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 (1945991548729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304724579 + ... + 304730964.

It is an arithmetic number, because the mean of its divisors is an integer number (253533506304).

Almost surely, 2^{1945991548799} is an apocalyptic number.

1945991548799 is a deficient number, since it is larger than the sum of its proper divisors (82276501633).

1945991548799 is a wasteful number, since it uses less digits than its factorization.

1945991548799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609455677.

The product of its digits is 1322697600, while the sum is 80.

The spelling of 1945991548799 in words is "one trillion, nine hundred forty-five billion, nine hundred ninety-one million, five hundred forty-eight thousand, seven hundred ninety-nine".