64224961920 has 192 divisors, whose sum is σ = 253459383840. Its totient is φ = 14679982080.

The previous prime is 64224961903. The next prime is 64224961939. The reversal of 64224961920 is 2916942246.

64224961920 is a `hidden beast` number, since 6 + 4 + 2 + 2 + 4 + 9 + 619 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 756121 + ... + 836760.

Almost surely, 2^64224961920 is an apocalyptic number.

64224961920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64224961920 is an abundant number, since it is smaller than the sum of its proper divisors (189234421920).

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

64224961920 is a wasteful number, since it uses less digits than its factorization.

64224961920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592913 (or 1592898 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 64224961920 in words is "sixty-four billion, two hundred twenty-four million, nine hundred sixty-one thousand, nine hundred twenty".