7881531238601 has 8 divisors (see below), whose sum is σ = 8017960125000. Its totient is φ = 7745335367040.

The previous prime is 7881531238597. The next prime is 7881531238697. The reversal of 7881531238601 is 1068321351887.

It can be written as a sum of positive squares in 4 ways, for example, as 1541086374025 + 6340444864576 = 1241405^2 + 2518024^2 .

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 7881531238601 - 2² = 7881531238597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7881531238201) 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, 58185476 + ... + 58320773.

It is an arithmetic number, because the mean of its divisors is an integer number (1002245015625).

Almost surely, 2^{7881531238601} is an apocalyptic number.

It is an amenable number.

7881531238601 is a deficient number, since it is larger than the sum of its proper divisors (136428886399).

7881531238601 is a wasteful number, since it uses less digits than its factorization.

7881531238601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116507419.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 7881531238601 in words is "seven trillion, eight hundred eighty-one billion, five hundred thirty-one million, two hundred thirty-eight thousand, six hundred one".