9870537656 has 48 divisors (see below), whose sum is σ = 22110744600. Its totient is φ = 4115893824.

The previous prime is 9870537623. The next prime is 9870537697. The reversal of 9870537656 is 6567350789.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325766 + ... + 354773.

Almost surely, 2^9870537656 is an apocalyptic number.

It is an amenable number.

9870537656 is an abundant number, since it is smaller than the sum of its proper divisors (12240206944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9870537656 is a wasteful number, since it uses less digits than its factorization.

9870537656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680596 (or 680585 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 56.

The square root of 9870537656 is about 99350.5795453655. The cubic root of 9870537656 is about 2145.0970052286.

The spelling of 9870537656 in words is "nine billion, eight hundred seventy million, five hundred thirty-seven thousand, six hundred fifty-six".