64011627440 has 40 divisors (see below), whose sum is σ = 151993575360. Its totient is φ = 25059869696.

The previous prime is 64011627431. The next prime is 64011627517. The reversal of 64011627440 is 4472611046.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64011627440.

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, 8508425 + ... + 8515944.

It is an arithmetic number, because the mean of its divisors is an integer number (3799839384).

Almost surely, 2^64011627440 is an apocalyptic number.

It is an amenable number.

64011627440 is an abundant number, since it is smaller than the sum of its proper divisors (87981947920).

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

64011627440 is a wasteful number, since it uses less digits than its factorization.

64011627440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17024429 (or 17024423 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 64011627440 in words is "sixty-four billion, eleven million, six hundred twenty-seven thousand, four hundred forty".