1631054257921 has 8 divisors (see below), whose sum is σ = 1883998501344. Its totient is φ = 1395554445120.

The previous prime is 1631054257873. The next prime is 1631054257927. The reversal of 1631054257921 is 1297524501361.

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

It is not a de Polignac number, because 1631054257921 - 2⁹ = 1631054257409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1631054257927) 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, 4361107455 + ... + 4361107828.

It is an arithmetic number, because the mean of its divisors is an integer number (235499812668).

Almost surely, 2^{1631054257921} is an apocalyptic number.

1631054257921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1631054257921 is a deficient number, since it is larger than the sum of its proper divisors (252944243423).

1631054257921 is a wasteful number, since it uses less digits than its factorization.

1631054257921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8722215311.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 1631054257921 in words is "one trillion, six hundred thirty-one billion, fifty-four million, two hundred fifty-seven thousand, nine hundred twenty-one".