64128626252442 has 64 divisors (see below), whose sum is σ = 147851819596800. Its totient is φ = 20581645129920.

The previous prime is 64128626252441. The next prime is 64128626252459. The reversal of 64128626252442 is 24425262682146.

64128626252442 is a `hidden beast` number, since 6 + 4 + 1 + 2 + 8 + 6 + 2 + 625 + 2 + 4 + 4 + 2 = 666.

It is a super-2 number, since 2×64128626252442² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64128626252441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96900217 + ... + 97559772.

It is an arithmetic number, because the mean of its divisors is an integer number (2310184681200).

Almost surely, 2^{64128626252442} is an apocalyptic number.

64128626252442 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

64128626252442 is an abundant number, since it is smaller than the sum of its proper divisors (83723193344358).

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

64128626252442 is a wasteful number, since it uses less digits than its factorization.

64128626252442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194460228 (or 194460222 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 54.

The spelling of 64128626252442 in words is "sixty-four trillion, one hundred twenty-eight billion, six hundred twenty-six million, two hundred fifty-two thousand, four hundred forty-two".