69440294640 has 80 divisors (see below), whose sum is σ = 221082912288. Its totient is φ = 18016939008.

The previous prime is 69440294611. The next prime is 69440294641. The reversal of 69440294640 is 4649204496.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 69440294640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69440294641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3901047 + ... + 3918806.

Almost surely, 2^69440294640 is an apocalyptic number.

69440294640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

69440294640 is an abundant number, since it is smaller than the sum of its proper divisors (151642617648).

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

69440294640 is a wasteful number, since it uses less digits than its factorization.

69440294640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819906 (or 7819900 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 69440294640 in words is "sixty-nine billion, four hundred forty million, two hundred ninety-four thousand, six hundred forty".