7681413631 has 4 divisors (see below), whose sum is σ = 7728539032. Its totient is φ = 7634288232.

The previous prime is 7681413589. The next prime is 7681413643. The reversal of 7681413631 is 1363141867.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7681413631 - 2¹⁹ = 7680889343 is a prime.

It is a super-2 number, since 2×7681413631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7681443631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23562456 + ... + 23562781.

It is an arithmetic number, because the mean of its divisors is an integer number (1932134758).

Almost surely, 2^7681413631 is an apocalyptic number.

7681413631 is a deficient number, since it is larger than the sum of its proper divisors (47125401).

7681413631 is a wasteful number, since it uses less digits than its factorization.

7681413631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47125400.

The product of its digits is 72576, while the sum is 40.

The square root of 7681413631 is about 87643.6742212466. The cubic root of 7681413631 is about 1973.0907046018.

The spelling of 7681413631 in words is "seven billion, six hundred eighty-one million, four hundred thirteen thousand, six hundred thirty-one".