2453391891 has 24 divisors (see below), whose sum is σ = 3732285440. Its totient is φ = 1548687600.

The previous prime is 2453391887. The next prime is 2453391901. The reversal of 2453391891 is 1981933542.

It is a happy number.

2453391891 is a `hidden beast` number, since 24 + 533 + 9 + 1 + 8 + 91 = 666.

It is not a de Polignac number, because 2453391891 - 2² = 2453391887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2453391821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 577746 + ... + 581976.

Almost surely, 2^2453391891 is an apocalyptic number.

2453391891 is a deficient number, since it is larger than the sum of its proper divisors (1278893549).

2453391891 is a wasteful number, since it uses less digits than its factorization.

2453391891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7647 (or 7644 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 2453391891 is about 49531.7261055982. The cubic root of 2453391891 is about 1348.7215864669.

The spelling of 2453391891 in words is "two billion, four hundred fifty-three million, three hundred ninety-one thousand, eight hundred ninety-one".