64421222250 has 128 divisors (see below), whose sum is σ = 200472330240. Its totient is φ = 13386216000.

The previous prime is 64421222231. The next prime is 64421222263. The reversal of 64421222250 is 5222212446.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 500010 + ... + 615509.

It is an arithmetic number, because the mean of its divisors is an integer number (1566190080).

Almost surely, 2^64421222250 is an apocalyptic number.

64421222250 is an abundant number, since it is smaller than the sum of its proper divisors (136051107990).

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

64421222250 is a wasteful number, since it uses less digits than its factorization.

64421222250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115557 (or 1115547 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 64421222250 its reverse (5222212446), we get a palindrome (69643434696).

The spelling of 64421222250 in words is "sixty-four billion, four hundred twenty-one million, two hundred twenty-two thousand, two hundred fifty".