65440989801 has 64 divisors (see below), whose sum is σ = 109440737280. Its totient is φ = 38288376000.

The previous prime is 65440989793. The next prime is 65440989829. The reversal of 65440989801 is 10898904456.

65440989801 is a `hidden beast` number, since 6 + 544 + 0 + 9 + 8 + 98 + 0 + 1 = 666.

65440989801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65440989801 - 2³ = 65440989793 is a prime.

It is a super-2 number, since 2×65440989801² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65440989841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3867706 + ... + 3884588.

It is an arithmetic number, because the mean of its divisors is an integer number (1710011520).

Almost surely, 2^65440989801 is an apocalyptic number.

It is an amenable number.

65440989801 is a deficient number, since it is larger than the sum of its proper divisors (43999747479).

65440989801 is a wasteful number, since it uses less digits than its factorization.

65440989801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17355 (or 17349 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 65440989801 in words is "sixty-five billion, four hundred forty million, nine hundred eighty-nine thousand, eight hundred one".