64378016250 has 160 divisors (see below), whose sum is σ = 163555495488. Its totient is φ = 16885440000.

The previous prime is 64378016237. The next prime is 64378016281. The reversal of 64378016250 is 5261087346.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 123565990 + ... + 123566510.

Almost surely, 2^64378016250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64378016250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81777747744).

64378016250 is an abundant number, since it is smaller than the sum of its proper divisors (99177479238).

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

64378016250 is a wasteful number, since it uses less digits than its factorization.

64378016250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 64378016250 in words is "sixty-four billion, three hundred seventy-eight million, sixteen thousand, two hundred fifty".