64135553622 has 64 divisors (see below), whose sum is σ = 148413980160. Its totient is φ = 18097618176.

The previous prime is 64135553611. The next prime is 64135553633. The reversal of 64135553622 is 22635553146.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64135553611) and next prime (64135553633).

It is a super-2 number, since 2×64135553622² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3380908 + ... + 3399824.

It is an arithmetic number, because the mean of its divisors is an integer number (2318968440).

Almost surely, 2^64135553622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64135553622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74206990080).

64135553622 is an abundant number, since it is smaller than the sum of its proper divisors (84278426538).

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

64135553622 is a wasteful number, since it uses less digits than its factorization.

64135553622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19925.

The product of its digits is 648000, while the sum is 42.

The spelling of 64135553622 in words is "sixty-four billion, one hundred thirty-five million, five hundred fifty-three thousand, six hundred twenty-two".