64779970078 has 8 divisors (see below), whose sum is σ = 97172095320. Its totient is φ = 32389271640.

The previous prime is 64779970019. The next prime is 64779970093. The reversal of 64779970078 is 87007997746.

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

It is a congruent number.

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, 234873 + ... + 429796.

It is an arithmetic number, because the mean of its divisors is an integer number (12146511915).

Almost surely, 2^64779970078 is an apocalyptic number.

64779970078 is a deficient number, since it is larger than the sum of its proper divisors (32392125242).

64779970078 is a wasteful number, since it uses less digits than its factorization.

64779970078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713402.

The product of its (nonzero) digits is 37340352, while the sum is 64.

The spelling of 64779970078 in words is "sixty-four billion, seven hundred seventy-nine million, nine hundred seventy thousand, seventy-eight".