64999409091602 has 8 divisors (see below), whose sum is σ = 97917564769596. Its totient is φ = 32360220835072.

The previous prime is 64999409091571. The next prime is 64999409091649. The reversal of 64999409091602 is 20619090499946.

It can be written as a sum of positive squares in 2 ways, for example, as 51788590352041 + 13210818739561 = 7196429^2 + 3634669^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69741854783 + ... + 69741855714.

Almost surely, 2^{64999409091602} is an apocalyptic number.

64999409091602 is a deficient number, since it is larger than the sum of its proper divisors (32918155677994).

64999409091602 is a wasteful number, since it uses less digits than its factorization.

64999409091602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139483710732.

The product of its (nonzero) digits is 68024448, while the sum is 68.

The spelling of 64999409091602 in words is "sixty-four trillion, nine hundred ninety-nine billion, four hundred nine million, ninety-one thousand, six hundred two".