64903619420 has 12 divisors (see below), whose sum is σ = 136297600824. Its totient is φ = 25961447760.

The previous prime is 64903619401. The next prime is 64903619423. The reversal of 64903619420 is 2491630946.

It is a happy number.

It is a super-2 number, since 2×64903619420² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64903619423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622590466 + ... + 1622590505.

It is an arithmetic number, because the mean of its divisors is an integer number (11358133402).

Almost surely, 2^64903619420 is an apocalyptic number.

It is an amenable number.

64903619420 is an abundant number, since it is smaller than the sum of its proper divisors (71393981404).

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

64903619420 is a wasteful number, since it uses less digits than its factorization.

64903619420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245180980 (or 3245180978 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 64903619420 in words is "sixty-four billion, nine hundred three million, six hundred nineteen thousand, four hundred twenty".