64861629 has 16 divisors (see below), whose sum is σ = 101509248. Its totient is φ = 36061632.

The previous prime is 64861627. The next prime is 64861651. The reversal of 64861629 is 92616846.

It is not a de Polignac number, because 64861629 - 2¹ = 64861627 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64861627) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 40962 + ... + 42515.

It is an arithmetic number, because the mean of its divisors is an integer number (6344328).

Almost surely, 2^64861629 is an apocalyptic number.

It is an amenable number.

64861629 is a deficient number, since it is larger than the sum of its proper divisors (36647619).

64861629 is a wasteful number, since it uses less digits than its factorization.

64861629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83524.

The product of its digits is 124416, while the sum is 42.

The square root of 64861629 is about 8053.6717713103. The cubic root of 64861629 is about 401.7870645277.

The spelling of 64861629 in words is "sixty-four million, eight hundred sixty-one thousand, six hundred twenty-nine".