7731421136 has 40 divisors (see below), whose sum is σ = 15414516384. Its totient is φ = 3753889920.

The previous prime is 7731421067. The next prime is 7731421153. The reversal of 7731421136 is 6311241377.

It is a junction number, because it is equal to n+sod(n) for n = 7731421096 and 7731421105.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 297131 + ... + 322101.

Almost surely, 2^7731421136 is an apocalyptic number.

It is an amenable number.

7731421136 is a deficient number, since it is larger than the sum of its proper divisors (7683095248).

7731421136 is a wasteful number, since it uses less digits than its factorization.

7731421136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25539 (or 25533 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 7731421136 is about 87928.5001350529. The cubic root of 7731421136 is about 1977.3631818728.

The spelling of 7731421136 in words is "seven billion, seven hundred thirty-one million, four hundred twenty-one thousand, one hundred thirty-six".