2153896054981 has 4 divisors (see below), whose sum is σ = 2349704787264. Its totient is φ = 1958087322700.

The previous prime is 2153896054979. The next prime is 2153896054987. The reversal of 2153896054981 is 1894506983512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2153896054981 - 2¹ = 2153896054979 is a prime.

It is a super-2 number, since 2×2153896054981² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153896054987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97904366125 + ... + 97904366146.

It is an arithmetic number, because the mean of its divisors is an integer number (587426196816).

Almost surely, 2^{2153896054981} is an apocalyptic number.

It is an amenable number.

2153896054981 is a deficient number, since it is larger than the sum of its proper divisors (195808732283).

2153896054981 is a wasteful number, since it uses less digits than its factorization.

2153896054981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195808732282.

The product of its (nonzero) digits is 18662400, while the sum is 61.

The spelling of 2153896054981 in words is "two trillion, one hundred fifty-three billion, eight hundred ninety-six million, fifty-four thousand, nine hundred eighty-one".