64155530438 has 8 divisors (see below), whose sum is σ = 97451438880. Its totient is φ = 31671717480.

The previous prime is 64155530431. The next prime is 64155530449. The reversal of 64155530438 is 83403555146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64155530438² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64155530431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203023673 + ... + 203023988.

It is an arithmetic number, because the mean of its divisors is an integer number (12181429860).

Almost surely, 2^64155530438 is an apocalyptic number.

64155530438 is a deficient number, since it is larger than the sum of its proper divisors (33295908442).

64155530438 is a wasteful number, since it uses less digits than its factorization.

64155530438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406047742.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 64155530438 in words is "sixty-four billion, one hundred fifty-five million, five hundred thirty thousand, four hundred thirty-eight".