664001505211540 has 24 divisors (see below), whose sum is σ = 1394431056127872. Its totient is φ = 265595288716320.

The previous prime is 664001505211537. The next prime is 664001505211619. The reversal of 664001505211540 is 45112505100466.

It is a junction number, because it is equal to n+sod(n) for n = 664001505211493 and 664001505211502.

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, 331060704 + ... + 333060343.

It is an arithmetic number, because the mean of its divisors is an integer number (58101294005328).

Almost surely, 2^{664001505211540} is an apocalyptic number.

It is an amenable number.

664001505211540 is an abundant number, since it is smaller than the sum of its proper divisors (730429550916332).

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

664001505211540 is a wasteful number, since it uses less digits than its factorization.

664001505211540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664171047 (or 664171045 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 664001505211540 in words is "six hundred sixty-four trillion, one billion, five hundred five million, two hundred eleven thousand, five hundred forty".