7987681532 has 6 divisors (see below), whose sum is σ = 13978442688. Its totient is φ = 3993840764.

The previous prime is 7987681531. The next prime is 7987681573. The reversal of 7987681532 is 2351867897.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987681531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998460188 + ... + 998460195.

It is an arithmetic number, because the mean of its divisors is an integer number (2329740448).

Almost surely, 2^7987681532 is an apocalyptic number.

It is an amenable number.

7987681532 is a deficient number, since it is larger than the sum of its proper divisors (5990761156).

7987681532 is a wasteful number, since it uses less digits than its factorization.

7987681532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996920387 (or 1996920385 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 56.

The square root of 7987681532 is about 89373.8302412960. The cubic root of 7987681532 is about 1998.9729336576.

The spelling of 7987681532 in words is "seven billion, nine hundred eighty-seven million, six hundred eighty-one thousand, five hundred thirty-two".