7953231690 has 24 divisors (see below), whose sum is σ = 20678402628. Its totient is φ = 2120861760.

The previous prime is 7953231661. The next prime is 7953231707. The reversal of 7953231690 is 961323597.

It can be written as a sum of positive squares in 2 ways, for example, as 7881710841 + 71520849 = 88779^2 + 8457^2 .

It is a super-2 number, since 2×7953231690² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 44184531 + ... + 44184710.

Almost surely, 2^7953231690 is an apocalyptic number.

7953231690 is an abundant number, since it is smaller than the sum of its proper divisors (12725170938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7953231690 is a wasteful number, since it uses less digits than its factorization.

7953231690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88369254 (or 88369251 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 7953231690 is about 89180.8930769366. The cubic root of 7953231690 is about 1996.0950213665.

The spelling of 7953231690 in words is "seven billion, nine hundred fifty-three million, two hundred thirty-one thousand, six hundred ninety".