64401205626 has 64 divisors (see below), whose sum is σ = 148065546240. Its totient is φ = 20727448560.

The previous prime is 64401205613. The next prime is 64401205643. The reversal of 64401205626 is 62650210446.

64401205626 is a `hidden beast` number, since 6 + 4 + 4 + 0 + 1 + 20 + 5 + 626 = 666.

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 31 ways as a sum of consecutive naturals, for example, 698161 + ... + 785003.

It is an arithmetic number, because the mean of its divisors is an integer number (2313524160).

Almost surely, 2^64401205626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64401205626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74032773120).

64401205626 is an abundant number, since it is smaller than the sum of its proper divisors (83664340614).

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

64401205626 is a wasteful number, since it uses less digits than its factorization.

64401205626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87328 (or 87322 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 64401205626 in words is "sixty-four billion, four hundred one million, two hundred five thousand, six hundred twenty-six".