65587543551 has 12 divisors (see below), whose sum is σ = 94754139480. Its totient is φ = 43717378320.

The previous prime is 65587543477. The next prime is 65587543561. The reversal of 65587543551 is 15534578556.

65587543551 is a `hidden beast` number, since 6 + 5 + 5 + 87 + 5 + 4 + 3 + 551 = 666.

It is not a de Polignac number, because 65587543551 - 2¹⁴ = 65587527167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65587543561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583021 + ... + 686358.

It is an arithmetic number, because the mean of its divisors is an integer number (7896178290).

Almost surely, 2^65587543551 is an apocalyptic number.

65587543551 is a deficient number, since it is larger than the sum of its proper divisors (29166595929).

65587543551 is a wasteful number, since it uses less digits than its factorization.

65587543551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275126 (or 1275123 counting only the distinct ones).

The product of its digits is 12600000, while the sum is 54.

The spelling of 65587543551 in words is "sixty-five billion, five hundred eighty-seven million, five hundred forty-three thousand, five hundred fifty-one".