78216304534766 has 16 divisors (see below), whose sum is σ = 117953341896960. Its totient is φ = 38898574669920.

The previous prime is 78216304534759. The next prime is 78216304534789. The reversal of 78216304534766 is 66743540361287.

It is a super-2 number, since 2×78216304534766² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78216304534699 and 78216304534708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9605381 + ... + 15770096.

It is an arithmetic number, because the mean of its divisors is an integer number (7372083868560).

Almost surely, 2^{78216304534766} is an apocalyptic number.

78216304534766 is a deficient number, since it is larger than the sum of its proper divisors (39737037362194).

78216304534766 is a wasteful number, since it uses less digits than its factorization.

78216304534766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25383739.

The product of its (nonzero) digits is 121927680, while the sum is 62.

The spelling of 78216304534766 in words is "seventy-eight trillion, two hundred sixteen billion, three hundred four million, five hundred thirty-four thousand, seven hundred sixty-six".