7845135654981 has 8 divisors (see below), whose sum is σ = 10577710995840. Its totient is φ = 5171325375392.

The previous prime is 7845135654953. The next prime is 7845135655013. The reversal of 7845135654981 is 1894565315487.

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 7845135654981 - 2¹¹ = 7845135652933 is a prime.

It is a super-2 number, since 2×7845135654981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7845135653981) 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, 14691265005 + ... + 14691265538.

It is an arithmetic number, because the mean of its divisors is an integer number (1322213874480).

Almost surely, 2^{7845135654981} is an apocalyptic number.

It is an amenable number.

7845135654981 is a deficient number, since it is larger than the sum of its proper divisors (2732575340859).

7845135654981 is a wasteful number, since it uses less digits than its factorization.

7845135654981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29382530635.

The product of its digits is 145152000, while the sum is 66.

The spelling of 7845135654981 in words is "seven trillion, eight hundred forty-five billion, one hundred thirty-five million, six hundred fifty-four thousand, nine hundred eighty-one".