7631616381 has 16 divisors (see below), whose sum is σ = 10311240960. Its totient is φ = 5019955200.

The previous prime is 7631616359. The next prime is 7631616427. The reversal of 7631616381 is 1836161367.

It is not a de Polignac number, because 7631616381 - 2¹⁰ = 7631615357 is a prime.

It is a super-3 number, since 3×7631616381³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7631616331) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 369381 + ... + 389493.

It is an arithmetic number, because the mean of its divisors is an integer number (644452560).

Almost surely, 2^7631616381 is an apocalyptic number.

It is an amenable number.

7631616381 is a deficient number, since it is larger than the sum of its proper divisors (2679624579).

7631616381 is a wasteful number, since it uses less digits than its factorization.

7631616381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21796.

The product of its digits is 108864, while the sum is 42.

The square root of 7631616381 is about 87359.1230553512. The cubic root of 7631616381 is about 1968.8177245657.

The spelling of 7631616381 in words is "seven billion, six hundred thirty-one million, six hundred sixteen thousand, three hundred eighty-one".