64156405 has 8 divisors (see below), whose sum is σ = 77031000. Its totient is φ = 51296256.

The previous prime is 64156357. The next prime is 64156441. The reversal of 64156405 is 50465146.

It can be written as a sum of positive squares in 4 ways, for example, as 8191044 + 55965361 = 2862^2 + 7481^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 64156405 - 2¹³ = 64148213 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13821 + ... + 17869.

It is an arithmetic number, because the mean of its divisors is an integer number (9628875).

Almost surely, 2^64156405 is an apocalyptic number.

It is an amenable number.

64156405 is a deficient number, since it is larger than the sum of its proper divisors (12874595).

64156405 is a wasteful number, since it uses less digits than its factorization.

64156405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7223.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 64156405 is about 8009.7693474906. The cubic root of 64156405 is about 400.3255786744.

The spelling of 64156405 in words is "sixty-four million, one hundred fifty-six thousand, four hundred five".