64843352778070 has 64 divisors (see below), whose sum is σ = 117444772065600. Its totient is φ = 25776412918272.

The previous prime is 64843352778059. The next prime is 64843352778073. The reversal of 64843352778070 is 7087725334846.

It is a junction number, because it is equal to n+sod(n) for n = 64843352777993 and 64843352778011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64843352778073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2854386352 + ... + 2854409068.

It is an arithmetic number, because the mean of its divisors is an integer number (1835074563525).

Almost surely, 2^{64843352778070} is an apocalyptic number.

64843352778070 is a deficient number, since it is larger than the sum of its proper divisors (52601419287530).

64843352778070 is a wasteful number, since it uses less digits than its factorization.

64843352778070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25777.

The product of its (nonzero) digits is 189665280, while the sum is 64.

The spelling of 64843352778070 in words is "sixty-four trillion, eight hundred forty-three billion, three hundred fifty-two million, seven hundred seventy-eight thousand, seventy".