65237344440 has 64 divisors (see below), whose sum is σ = 204221260800. Its totient is φ = 16640249472.

The previous prime is 65237344409. The next prime is 65237344453. The reversal of 65237344440 is 4444373256.

It is a super-2 number, since 2×65237344440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65237344392 and 65237344401.

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, 11815600 + ... + 11821119.

It is an arithmetic number, because the mean of its divisors is an integer number (3190957200).

Almost surely, 2^65237344440 is an apocalyptic number.

65237344440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65237344440 is an abundant number, since it is smaller than the sum of its proper divisors (138983916360).

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

65237344440 is a wasteful number, since it uses less digits than its factorization.

65237344440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23636756 (or 23636752 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 42.

The spelling of 65237344440 in words is "sixty-five billion, two hundred thirty-seven million, three hundred forty-four thousand, four hundred forty".