64371664429 has 4 divisors (see below), whose sum is σ = 64375601884. Its totient is φ = 64367726976.

The previous prime is 64371664397. The next prime is 64371664447. The reversal of 64371664429 is 92446617346.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8296477225 + 56075187204 = 91085^2 + 236802^2 .

It is a cyclic number.

It is not a de Polignac number, because 64371664429 - 2⁵ = 64371664397 is a prime.

It is a super-4 number, since 4×64371664429⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64371664829) 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, 1944102 + ... + 1976935.

It is an arithmetic number, because the mean of its divisors is an integer number (16093900471).

Almost surely, 2^64371664429 is an apocalyptic number.

It is an amenable number.

64371664429 is a deficient number, since it is larger than the sum of its proper divisors (3937455).

64371664429 is a wasteful number, since it uses less digits than its factorization.

64371664429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3937454.

The product of its digits is 5225472, while the sum is 52.

The spelling of 64371664429 in words is "sixty-four billion, three hundred seventy-one million, six hundred sixty-four thousand, four hundred twenty-nine".