77085464217715 has 16 divisors (see below), whose sum is σ = 93542996966400. Its totient is φ = 60974760850432.

The previous prime is 77085464217709. The next prime is 77085464217719. The reversal of 77085464217715 is 51771246458077.

It is a cyclic number.

It is not a de Polignac number, because 77085464217715 - 2⁴¹ = 74886440962163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77085464217719) 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, 39196539 + ... + 41116171.

It is an arithmetic number, because the mean of its divisors is an integer number (5846437310400).

Almost surely, 2^{77085464217715} is an apocalyptic number.

77085464217715 is a deficient number, since it is larger than the sum of its proper divisors (16457532748685).

77085464217715 is a wasteful number, since it uses less digits than its factorization.

77085464217715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009966.

The product of its (nonzero) digits is 92198400, while the sum is 64.

The spelling of 77085464217715 in words is "seventy-seven trillion, eighty-five billion, four hundred sixty-four million, two hundred seventeen thousand, seven hundred fifteen".