64840135 has 8 divisors (see below), whose sum is σ = 78610896. Its totient is φ = 51336960.

The previous prime is 64840129. The next prime is 64840157. The reversal of 64840135 is 53104846.

It is a happy number.

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

It is not a de Polignac number, because 64840135 - 2⁷ = 64840007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64840097 and 64840106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66361 + ... + 67330.

It is an arithmetic number, because the mean of its divisors is an integer number (9826362).

Almost surely, 2^64840135 is an apocalyptic number.

64840135 is a deficient number, since it is larger than the sum of its proper divisors (13770761).

64840135 is a wasteful number, since it uses less digits than its factorization.

64840135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133793.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 64840135 is about 8052.3372383427. The cubic root of 64840135 is about 401.7426779085.

The spelling of 64840135 in words is "sixty-four million, eight hundred forty thousand, one hundred thirty-five".