7681621532 has 24 divisors (see below), whose sum is σ = 14784926016. Its totient is φ = 3469929408.

The previous prime is 7681621483. The next prime is 7681621553. The reversal of 7681621532 is 2351261867.

It is a self number, because there is not a number n which added to its sum of digits gives 7681621532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1569083 + ... + 1573970.

It is an arithmetic number, because the mean of its divisors is an integer number (616038584).

Almost surely, 2^7681621532 is an apocalyptic number.

It is an amenable number.

7681621532 is a deficient number, since it is larger than the sum of its proper divisors (7103304484).

7681621532 is a wasteful number, since it uses less digits than its factorization.

7681621532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143117 (or 3143115 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 7681621532 is about 87644.8602714386. The cubic root of 7681621532 is about 1973.1085053110.

The spelling of 7681621532 in words is "seven billion, six hundred eighty-one million, six hundred twenty-one thousand, five hundred thirty-two".