64037378840446 has 16 divisors (see below), whose sum is σ = 106352444643840. Its totient is φ = 28673453211480.

The previous prime is 64037378840443. The next prime is 64037378840471. The reversal of 64037378840446 is 64404887373046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64037378840443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21722311566 + ... + 21722314513.

It is an arithmetic number, because the mean of its divisors is an integer number (6647027790240).

Almost surely, 2^{64037378840446} is an apocalyptic number.

64037378840446 is a deficient number, since it is larger than the sum of its proper divisors (42315065803394).

64037378840446 is a wasteful number, since it uses less digits than its factorization.

64037378840446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43444626159.

The product of its (nonzero) digits is 260112384, while the sum is 64.

The spelling of 64037378840446 in words is "sixty-four trillion, thirty-seven billion, three hundred seventy-eight million, eight hundred forty thousand, four hundred forty-six".