64419226691556 has 48 divisors (see below), whose sum is σ = 165331388755008. Its totient is φ = 19520977780480.

The previous prime is 64419226691549. The next prime is 64419226691591. The reversal of 64419226691556 is 65519662291446.

It is a super-3 number, since 3×64419226691556³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2016613965 + ... + 2016645908.

It is an arithmetic number, because the mean of its divisors is an integer number (3444403932396).

Almost surely, 2^{64419226691556} is an apocalyptic number.

64419226691556 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64419226691556 is an abundant number, since it is smaller than the sum of its proper divisors (100912162063452).

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

64419226691556 is a wasteful number, since it uses less digits than its factorization.

64419226691556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033259913 (or 4033259889 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 66.

The spelling of 64419226691556 in words is "sixty-four trillion, four hundred nineteen billion, two hundred twenty-six million, six hundred ninety-one thousand, five hundred fifty-six".