64367652440 has 384 divisors, whose sum is σ = 188639539200. Its totient is φ = 19578424320.

The previous prime is 64367652431. The next prime is 64367652457. The reversal of 64367652440 is 4425676346.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70655585 + ... + 70656495.

It is an arithmetic number, because the mean of its divisors is an integer number (491248800).

Almost surely, 2^64367652440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64367652440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94319769600).

64367652440 is an abundant number, since it is smaller than the sum of its proper divisors (124271886760).

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

64367652440 is a wasteful number, since it uses less digits than its factorization.

64367652440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 64367652440 in words is "sixty-four billion, three hundred sixty-seven million, six hundred fifty-two thousand, four hundred forty".