7971630442 has 8 divisors (see below), whose sum is σ = 11958013476. Its totient is φ = 3985625952.

The previous prime is 7971630431. The next prime is 7971630493. The reversal of 7971630442 is 2440361797.

It can be written as a sum of positive squares in 2 ways, for example, as 7733267721 + 238362721 = 87939^2 + 15439^2 .

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

It is a super-2 number, since 2×7971630442² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34293 + ... + 130840.

Almost surely, 2^7971630442 is an apocalyptic number.

7971630442 is a deficient number, since it is larger than the sum of its proper divisors (3986383034).

7971630442 is a wasteful number, since it uses less digits than its factorization.

7971630442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189272.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 7971630442 is about 89283.9876013611. The cubic root of 7971630442 is about 1997.6330700931.

The spelling of 7971630442 in words is "seven billion, nine hundred seventy-one million, six hundred thirty thousand, four hundred forty-two".