7961249789533 has 4 divisors (see below), whose sum is σ = 8429558600700. Its totient is φ = 7492940978368.

The previous prime is 7961249789501. The next prime is 7961249789539. The reversal of 7961249789533 is 3359879421697.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6635889344484 + 1325360445049 = 2576022^2 + 1151243^2 .

It is a cyclic number.

It is not a de Polignac number, because 7961249789533 - 2⁵ = 7961249789501 is a prime.

It is a super-2 number, since 2×7961249789533² (a number of 27 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 (7961249789539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234154405558 + ... + 234154405591.

It is an arithmetic number, because the mean of its divisors is an integer number (2107389650175).

Almost surely, 2^{7961249789533} is an apocalyptic number.

It is an amenable number.

7961249789533 is a deficient number, since it is larger than the sum of its proper divisors (468308811167).

7961249789533 is a wasteful number, since it uses less digits than its factorization.

7961249789533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468308811166.

The product of its digits is 617258880, while the sum is 73.

The spelling of 7961249789533 in words is "seven trillion, nine hundred sixty-one billion, two hundred forty-nine million, seven hundred eighty-nine thousand, five hundred thirty-three".