64487187500 has 96 divisors (see below), whose sum is σ = 148503526080. Its totient is φ = 24435000000.

The previous prime is 64487187467. The next prime is 64487187547. The reversal of 64487187500 is 578178446.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5932070 + ... + 5942930.

It is an arithmetic number, because the mean of its divisors is an integer number (1546911730).

Almost surely, 2^64487187500 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 64487187500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74251763040).

64487187500 is an abundant number, since it is smaller than the sum of its proper divisors (84016338580).

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

64487187500 is an equidigital number, since it uses as much as digits as its factorization.

64487187500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10919 (or 10887 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 64487187500 in words is "sixty-four billion, four hundred eighty-seven million, one hundred eighty-seven thousand, five hundred".