64621402135 has 4 divisors (see below), whose sum is σ = 77545682568. Its totient is φ = 51697121704.

The previous prime is 64621402127. The next prime is 64621402187. The reversal of 64621402135 is 53120412646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64621402135 - 2³ = 64621402127 is a prime.

It is a super-2 number, since 2×64621402135² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64621402135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462140209 + ... + 6462140218.

It is an arithmetic number, because the mean of its divisors is an integer number (19386420642).

Almost surely, 2^64621402135 is an apocalyptic number.

64621402135 is a deficient number, since it is larger than the sum of its proper divisors (12924280433).

64621402135 is a wasteful number, since it uses less digits than its factorization.

64621402135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12924280432.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 64621402135 in words is "sixty-four billion, six hundred twenty-one million, four hundred two thousand, one hundred thirty-five".