64819644091492 has 12 divisors (see below), whose sum is σ = 120106987581420. Its totient is φ = 30503361925376.

The previous prime is 64819644091487. The next prime is 64819644091561. The reversal of 64819644091492 is 29419044691846.

It can be written as a sum of positive squares in 2 ways, for example, as 32456902833216 + 32362741258276 = 5697096^2 + 5688826^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476615030017 + ... + 476615030152.

It is an arithmetic number, because the mean of its divisors is an integer number (10008915631785).

Almost surely, 2^{64819644091492} is an apocalyptic number.

It is an amenable number.

64819644091492 is a deficient number, since it is larger than the sum of its proper divisors (55287343489928).

64819644091492 is a wasteful number, since it uses less digits than its factorization.

64819644091492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953230060190 (or 953230060188 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 64819644091492 in words is "sixty-four trillion, eight hundred nineteen billion, six hundred forty-four million, ninety-one thousand, four hundred ninety-two".