264289871638 has 8 divisors (see below), whose sum is σ = 426929792688. Its totient is φ = 121979940744.

The previous prime is 264289871557. The next prime is 264289871639. The reversal of 264289871638 is 836178982462.

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

It is a self number, because there is not a number n which added to its sum of digits gives 264289871638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264289871639) 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, 5082497506 + ... + 5082497557.

It is an arithmetic number, because the mean of its divisors is an integer number (53366224086).

Almost surely, 2^264289871638 is an apocalyptic number.

264289871638 is a deficient number, since it is larger than the sum of its proper divisors (162639921050).

264289871638 is a wasteful number, since it uses less digits than its factorization.

264289871638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10164995078.

The product of its digits is 55738368, while the sum is 64.

The spelling of 264289871638 in words is "two hundred sixty-four billion, two hundred eighty-nine million, eight hundred seventy-one thousand, six hundred thirty-eight".