61656543 has 48 divisors (see below), whose sum is σ = 99931104. Its totient is φ = 36391680.

The previous prime is 61656533. The next prime is 61656547. The reversal of 61656543 is 34565616.

61656543 is a `hidden beast` number, since 61 + 6 + 56 + 543 = 666.

It is not a de Polignac number, because 61656543 - 2¹⁰ = 61655519 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 61656498 and 61656507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61656547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 378180 + ... + 378342.

It is an arithmetic number, because the mean of its divisors is an integer number (2081898).

Almost surely, 2^61656543 is an apocalyptic number.

61656543 is a deficient number, since it is larger than the sum of its proper divisors (38274561).

61656543 is a wasteful number, since it uses less digits than its factorization.

61656543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 293 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 61656543 is about 7852.1680445594. The cubic root of 61656543 is about 395.0569655598.

The spelling of 61656543 in words is "sixty-one million, six hundred fifty-six thousand, five hundred forty-three".