65264557040 has 20 divisors (see below), whose sum is σ = 151740095304. Its totient is φ = 26105822784.

The previous prime is 65264557027. The next prime is 65264557049. The reversal of 65264557040 is 4075546256.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 65264556982 and 65264557000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65264557049) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 407903402 + ... + 407903561.

Almost surely, 2^65264557040 is an apocalyptic number.

It is an amenable number.

65264557040 is an abundant number, since it is smaller than the sum of its proper divisors (86475538264).

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

65264557040 is a wasteful number, since it uses less digits than its factorization.

65264557040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815806976 (or 815806970 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 44.

The spelling of 65264557040 in words is "sixty-five billion, two hundred sixty-four million, five hundred fifty-seven thousand, forty".