1974454544791 has 4 divisors (see below), whose sum is σ = 1992907391112. Its totient is φ = 1956001698472.

The previous prime is 1974454544747. The next prime is 1974454544809.

It is a happy number.

1974454544791 is nontrivially palindromic in base 10.

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 1974454544791 - 2⁷ = 1974454544663 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 (1974454544291) 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, 9226423000 + ... + 9226423213.

It is an arithmetic number, because the mean of its divisors is an integer number (498226847778).

Almost surely, 2^{1974454544791} is an apocalyptic number.

1974454544791 is a deficient number, since it is larger than the sum of its proper divisors (18452846321).

1974454544791 is a wasteful number, since it uses less digits than its factorization.

1974454544791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18452846320.

The product of its digits is 101606400, while the sum is 64.

The spelling of 1974454544791 in words is "one trillion, nine hundred seventy-four billion, four hundred fifty-four million, five hundred forty-four thousand, seven hundred ninety-one".