64038202778 has 32 divisors (see below), whose sum is σ = 110886008832. Its totient is φ = 27450530800.

The previous prime is 64038202777. The next prime is 64038202793. The reversal of 64038202778 is 87720283046.

It is not an unprimeable number, because it can be changed into a prime (64038202777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855326 + ... + 927177.

It is an arithmetic number, because the mean of its divisors is an integer number (3465187776).

Almost surely, 2^64038202778 is an apocalyptic number.

64038202778 is a deficient number, since it is larger than the sum of its proper divisors (46847806054).

64038202778 is a wasteful number, since it uses less digits than its factorization.

64038202778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782610.

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 64038202778 in words is "sixty-four billion, thirty-eight million, two hundred two thousand, seven hundred seventy-eight".