64236453620 has 24 divisors (see below), whose sum is σ = 141996372000. Its totient is φ = 24342234912.

The previous prime is 64236453607. The next prime is 64236453643. The reversal of 64236453620 is 2635463246.

It is a super-2 number, since 2×64236453620² (a number of 22 digits) contains 22 as substring.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 84521270 + ... + 84522029.

It is an arithmetic number, because the mean of its divisors is an integer number (5916515500).

Almost surely, 2^64236453620 is an apocalyptic number.

It is an amenable number.

64236453620 is an abundant number, since it is smaller than the sum of its proper divisors (77759918380).

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

64236453620 is a wasteful number, since it uses less digits than its factorization.

64236453620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169043327 (or 169043325 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 41.

The spelling of 64236453620 in words is "sixty-four billion, two hundred thirty-six million, four hundred fifty-three thousand, six hundred twenty".