649607072078 has 8 divisors (see below), whose sum is σ = 1000746030072. Its totient is φ = 316025062056.

The previous prime is 649607072057. The next prime is 649607072113. The reversal of 649607072078 is 870270706946.

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, 4389236900 + ... + 4389237047.

It is an arithmetic number, because the mean of its divisors is an integer number (125093253759).

Almost surely, 2^649607072078 is an apocalyptic number.

649607072078 is a deficient number, since it is larger than the sum of its proper divisors (351138957994).

649607072078 is a wasteful number, since it uses less digits than its factorization.

649607072078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778473986.

The product of its (nonzero) digits is 7112448, while the sum is 56.

The spelling of 649607072078 in words is "six hundred forty-nine billion, six hundred seven million, seventy-two thousand, seventy-eight".