65488551 has 8 divisors (see below), whose sum is σ = 88423680. Its totient is φ = 43106232.

The previous prime is 65488543. The next prime is 65488559. The reversal of 65488551 is 15588456.

It is an interprime number because it is at equal distance from previous prime (65488543) and next prime (65488559).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65488551 - 2³ = 65488543 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65488559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137925 + ... + 138398.

It is an arithmetic number, because the mean of its divisors is an integer number (11052960).

Almost surely, 2^65488551 is an apocalyptic number.

65488551 is a deficient number, since it is larger than the sum of its proper divisors (22935129).

65488551 is a wasteful number, since it uses less digits than its factorization.

65488551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276405.

The product of its digits is 192000, while the sum is 42.

The square root of 65488551 is about 8092.4996756256. The cubic root of 65488551 is about 403.0774110520.

The spelling of 65488551 in words is "sixty-five million, four hundred eighty-eight thousand, five hundred fifty-one".