2153245876981 has 8 divisors (see below), whose sum is σ = 2217706432344. Its totient is φ = 2089115043840.

The previous prime is 2153245876967. The next prime is 2153245876987. The reversal of 2153245876981 is 1896785423512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 95599074481 + 2057646802500 = 309191^2 + 1434450^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2153245876981 - 2¹³ = 2153245868789 is a prime.

It is a super-2 number, since 2×2153245876981² (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 (2153245876987) 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, 82417300 + ... + 82443421.

It is an arithmetic number, because the mean of its divisors is an integer number (277213304043).

Almost surely, 2^{2153245876981} is an apocalyptic number.

It is an amenable number.

2153245876981 is a deficient number, since it is larger than the sum of its proper divisors (64460555363).

2153245876981 is a wasteful number, since it uses less digits than its factorization.

2153245876981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164861111.

The product of its digits is 29030400, while the sum is 61.

The spelling of 2153245876981 in words is "two trillion, one hundred fifty-three billion, two hundred forty-five million, eight hundred seventy-six thousand, nine hundred eighty-one".