65515079287 has 8 divisors (see below), whose sum is σ = 74944426400. Its totient is φ = 56103244704.

The previous prime is 65515079207. The next prime is 65515079291. The reversal of 65515079287 is 78297051556.

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

It is a cyclic number.

It is not a de Polignac number, because 65515079287 - 2³⁵ = 31155340919 is a prime.

It is a super-2 number, since 2×65515079287² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65515079207) 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, 4370112 + ... + 4385077.

It is an arithmetic number, because the mean of its divisors is an integer number (9368053300).

Almost surely, 2^65515079287 is an apocalyptic number.

65515079287 is a deficient number, since it is larger than the sum of its proper divisors (9429347113).

65515079287 is a wasteful number, since it uses less digits than its factorization.

65515079287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8756265.

The product of its (nonzero) digits is 5292000, while the sum is 55.

It can be divided in two parts, 655150 and 79287, that added together give a palindrome (734437).

The spelling of 65515079287 in words is "sixty-five billion, five hundred fifteen million, seventy-nine thousand, two hundred eighty-seven".