1953263454891 has 8 divisors (see below), whose sum is σ = 2976401455104. Its totient is φ = 1116150545640.

The previous prime is 1953263454847. The next prime is 1953263454893. The reversal of 1953263454891 is 1984543623591.

It is a happy number.

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

It is not a de Polignac number, because 1953263454891 - 2¹⁴ = 1953263438507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1953263454893) 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, 46506272715 + ... + 46506272756.

It is an arithmetic number, because the mean of its divisors is an integer number (372050181888).

Almost surely, 2^{1953263454891} is an apocalyptic number.

1953263454891 is a deficient number, since it is larger than the sum of its proper divisors (1023138000213).

1953263454891 is an equidigital number, since it uses as much as digits as its factorization.

1953263454891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93012545481.

The product of its digits is 27993600, while the sum is 60.

The spelling of 1953263454891 in words is "one trillion, nine hundred fifty-three billion, two hundred sixty-three million, four hundred fifty-four thousand, eight hundred ninety-one".