65540727556 has 6 divisors (see below), whose sum is σ = 114696273230. Its totient is φ = 32770363776.

The previous prime is 65540727547. The next prime is 65540727559. The reversal of 65540727556 is 65572704556.

It can be written as a sum of positive squares in only one way, i.e., 64498729156 + 1041998400 = 253966^2 + 32280^2 .

It is not an unprimeable number, because it can be changed into a prime (65540727559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8192590941 + ... + 8192590948.

Almost surely, 2^65540727556 is an apocalyptic number.

It is an amenable number.

65540727556 is a deficient number, since it is larger than the sum of its proper divisors (49155545674).

65540727556 is a wasteful number, since it uses less digits than its factorization.

65540727556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16385181893 (or 16385181891 counting only the distinct ones).

The product of its (nonzero) digits is 8820000, while the sum is 52.

The spelling of 65540727556 in words is "sixty-five billion, five hundred forty million, seven hundred twenty-seven thousand, five hundred fifty-six".