69664095440 has 40 divisors (see below), whose sum is σ = 162062378088. Its totient is φ = 27849576960.

The previous prime is 69664095407. The next prime is 69664095461. The reversal of 69664095440 is 4459046696.

It can be written as a sum of positive squares in 4 ways, for example, as 6614894224 + 63049201216 = 81332^2 + 251096^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110807 + ... + 389366.

Almost surely, 2^69664095440 is an apocalyptic number.

It is an amenable number.

69664095440 is an abundant number, since it is smaller than the sum of its proper divisors (92398282648).

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

69664095440 is a wasteful number, since it uses less digits than its factorization.

69664095440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501927 (or 501921 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 69664095440 in words is "sixty-nine billion, six hundred sixty-four million, ninety-five thousand, four hundred forty".