7961575749 has 16 divisors (see below), whose sum is σ = 10726552512. Its totient is φ = 5252439168.

The previous prime is 7961575733. The next prime is 7961575753. The reversal of 7961575749 is 9475751697.

It is not a de Polignac number, because 7961575749 - 2⁴ = 7961575733 is a prime.

It is a super-2 number, since 2×7961575749² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7961575692 and 7961575701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7961575709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78999 + ... + 148875.

It is an arithmetic number, because the mean of its divisors is an integer number (670409532).

Almost surely, 2^7961575749 is an apocalyptic number.

It is an amenable number.

7961575749 is a deficient number, since it is larger than the sum of its proper divisors (2764976763).

7961575749 is a wasteful number, since it uses less digits than its factorization.

7961575749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70276.

The product of its digits is 16669800, while the sum is 60.

The square root of 7961575749 is about 89227.6624651795. The cubic root of 7961575749 is about 1996.7928388912.

The spelling of 7961575749 in words is "seven billion, nine hundred sixty-one million, five hundred seventy-five thousand, seven hundred forty-nine".