7851358380646 has 16 divisors (see below), whose sum is σ = 12848764627728. Its totient is φ = 3568497242400.

The previous prime is 7851358380641. The next prime is 7851358380707. The reversal of 7851358380646 is 6460838531587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7851358380641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14835105 + ... + 15355228.

It is an arithmetic number, because the mean of its divisors is an integer number (803047789233).

Almost surely, 2^{7851358380646} is an apocalyptic number.

7851358380646 is a deficient number, since it is larger than the sum of its proper divisors (4997406247082).

7851358380646 is a wasteful number, since it uses less digits than its factorization.

7851358380646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30202167.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 7851358380646 in words is "seven trillion, eight hundred fifty-one billion, three hundred fifty-eight million, three hundred eighty thousand, six hundred forty-six".