64623599040 has 1008 divisors, whose sum is σ = 282327949440. Its totient is φ = 12378562560.

The previous prime is 64623599023. The next prime is 64623599059. The reversal of 64623599040 is 4099532646.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 87446991 + ... + 87447729.

Almost surely, 2^64623599040 is an apocalyptic number.

64623599040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64623599040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141163974720).

64623599040 is an abundant number, since it is smaller than the sum of its proper divisors (217704350400).

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

64623599040 is a wasteful number, since it uses less digits than its factorization.

64623599040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 48.

The spelling of 64623599040 in words is "sixty-four billion, six hundred twenty-three million, five hundred ninety-nine thousand, forty".