7971449546 has 8 divisors (see below), whose sum is σ = 11987294340. Its totient is φ = 3975684768.

The previous prime is 7971449537. The next prime is 7971449573. The reversal of 7971449546 is 6459441797.

It can be written as a sum of positive squares in 2 ways, for example, as 7649426521 + 322023025 = 87461^2 + 17945^2 .

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

It is a super-2 number, since 2×7971449546² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7971449491 and 7971449500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5019011 + ... + 5020598.

Almost surely, 2^7971449546 is an apocalyptic number.

7971449546 is a deficient number, since it is larger than the sum of its proper divisors (4015844794).

7971449546 is a wasteful number, since it uses less digits than its factorization.

7971449546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040008.

The product of its digits is 7620480, while the sum is 56.

The square root of 7971449546 is about 89282.9745584230. The cubic root of 7971449546 is about 1997.6179595680.

The spelling of 7971449546 in words is "seven billion, nine hundred seventy-one million, four hundred forty-nine thousand, five hundred forty-six".