1954391276991 has 16 divisors (see below), whose sum is σ = 2747284611840. Its totient is φ = 1232426695680.

The previous prime is 1954391276941. The next prime is 1954391277001. The reversal of 1954391276991 is 1996721934591.

It is not a de Polignac number, because 1954391276991 - 2⁶ = 1954391276927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954391276941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26708835 + ... + 26781908.

It is an arithmetic number, because the mean of its divisors is an integer number (171705288240).

Almost surely, 2^{1954391276991} is an apocalyptic number.

1954391276991 is a deficient number, since it is larger than the sum of its proper divisors (792893334849).

1954391276991 is a wasteful number, since it uses less digits than its factorization.

1954391276991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53491406.

The product of its digits is 33067440, while the sum is 66.

The spelling of 1954391276991 in words is "one trillion, nine hundred fifty-four billion, three hundred ninety-one million, two hundred seventy-six thousand, nine hundred ninety-one".