97556643 has 20 divisors (see below), whose sum is σ = 146018928. Its totient is φ = 64910160.

The previous prime is 97556633. The next prime is 97556651. The reversal of 97556643 is 34665579.

97556643 is a `hidden beast` number, since 97 + 556 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 97556643 - 2¹⁸ = 97294499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97556633) 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, 59373 + ... + 60993.

Almost surely, 2^97556643 is an apocalyptic number.

97556643 is a deficient number, since it is larger than the sum of its proper divisors (48462285).

97556643 is a wasteful number, since it uses less digits than its factorization.

97556643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376 (or 2367 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 97556643 is about 9877.0766424079. The cubic root of 97556643 is about 460.3473164626.

The spelling of 97556643 in words is "ninety-seven million, five hundred fifty-six thousand, six hundred forty-three".