64630591436 has 12 divisors (see below), whose sum is σ = 117003657120. Its totient is φ = 31200975120.

The previous prime is 64630591423. The next prime is 64630591439. The reversal of 64630591436 is 63419503646.

It is a super-3 number, since 3×64630591436³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64630591439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278580020 + ... + 278580251.

It is an arithmetic number, because the mean of its divisors is an integer number (9750304760).

Almost surely, 2^64630591436 is an apocalyptic number.

It is an amenable number.

64630591436 is a deficient number, since it is larger than the sum of its proper divisors (52373065684).

64630591436 is a wasteful number, since it uses less digits than its factorization.

64630591436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557160304 (or 557160302 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 64630591436 in words is "sixty-four billion, six hundred thirty million, five hundred ninety-one thousand, four hundred thirty-six".