65415681078 has 32 divisors (see below), whose sum is σ = 142745258880. Its totient is φ = 19820136960.

The previous prime is 65415681061. The next prime is 65415681101. The reversal of 65415681078 is 87018651456.

It is a super-2 number, since 2×65415681078² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65415681078.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428101 + ... + 560447.

It is an arithmetic number, because the mean of its divisors is an integer number (4460789340).

Almost surely, 2^65415681078 is an apocalyptic number.

65415681078 is an abundant number, since it is smaller than the sum of its proper divisors (77329577802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65415681078 is a wasteful number, since it uses less digits than its factorization.

65415681078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139852.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 65415681078 in words is "sixty-five billion, four hundred fifteen million, six hundred eighty-one thousand, seventy-eight".