65290678840 has 64 divisors (see below), whose sum is σ = 150586840800. Its totient is φ = 25463703552.

The previous prime is 65290678829. The next prime is 65290678879. The reversal of 65290678840 is 4887609256.

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, 945324 + ... + 1012036.

Almost surely, 2^65290678840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65290678840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75293420400).

65290678840 is an abundant number, since it is smaller than the sum of its proper divisors (85296161960).

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

65290678840 is a wasteful number, since it uses less digits than its factorization.

65290678840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67336 (or 67332 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 65290678840 in words is "sixty-five billion, two hundred ninety million, six hundred seventy-eight thousand, eight hundred forty".