7987456737 has 20 divisors (see below), whose sum is σ = 12849718420. Its totient is φ = 4915357344.

The previous prime is 7987456727. The next prime is 7987456751. The reversal of 7987456737 is 7376547897.

7987456737 is a `hidden beast` number, since 79 + 87 + 456 + 7 + 37 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2120049936 + 5867406801 = 46044^2 + 76599^2 .

It is not a de Polignac number, because 7987456737 - 2⁸ = 7987456481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7987456717) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3791662 + ... + 3793767.

It is an arithmetic number, because the mean of its divisors is an integer number (642485921).

Almost surely, 2^7987456737 is an apocalyptic number.

It is an amenable number.

7987456737 is a deficient number, since it is larger than the sum of its proper divisors (4862261683).

7987456737 is a wasteful number, since it uses less digits than its factorization.

7987456737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7585454 (or 7585445 counting only the distinct ones).

The product of its digits is 62233920, while the sum is 63.

The square root of 7987456737 is about 89372.5726215823. The cubic root of 7987456737 is about 1998.9541813103.

The spelling of 7987456737 in words is "seven billion, nine hundred eighty-seven million, four hundred fifty-six thousand, seven hundred thirty-seven".