64429873015 has 16 divisors (see below), whose sum is σ = 78417011232. Its totient is φ = 50813927424.

The previous prime is 64429873009. The next prime is 64429873037. The reversal of 64429873015 is 51037892446.

It is a happy number.

It is a 16-Lehmer number, since φ(64429873015) divides (64429873015-1)¹⁶.

It is a cyclic number.

It is not a de Polignac number, because 64429873015 - 2¹⁹ = 64429348727 is a prime.

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 64429873015.

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 15 ways as a sum of consecutive naturals, for example, 133809 + ... + 383098.

It is an arithmetic number, because the mean of its divisors is an integer number (4901063202).

It is a 2-persistent number, because it is pandigital, and so is 2⋅64429873015 = 128859746030, but 3⋅64429873015 = 193289619045 is not.

Almost surely, 2^64429873015 is an apocalyptic number.

64429873015 is a deficient number, since it is larger than the sum of its proper divisors (13987138217).

64429873015 is a wasteful number, since it uses less digits than its factorization.

64429873015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517266.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 64429873015 in words is "sixty-four billion, four hundred twenty-nine million, eight hundred seventy-three thousand, fifteen".