64355563387 has 16 divisors (see below), whose sum is σ = 67660248832. Its totient is φ = 61134484320.

The previous prime is 64355563381. The next prime is 64355563403. The reversal of 64355563387 is 78336555346.

It is not a de Polignac number, because 64355563387 - 2¹¹ = 64355561339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64355563381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4586212 + ... + 4600222.

It is an arithmetic number, because the mean of its divisors is an integer number (4228765552).

Almost surely, 2^64355563387 is an apocalyptic number.

64355563387 is a deficient number, since it is larger than the sum of its proper divisors (3304685445).

64355563387 is a wasteful number, since it uses less digits than its factorization.

64355563387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16978.

The product of its digits is 27216000, while the sum is 55.

The spelling of 64355563387 in words is "sixty-four billion, three hundred fifty-five million, five hundred sixty-three thousand, three hundred eighty-seven".