85497772813 has 16 divisors (see below), whose sum is σ = 87336910080. Its totient is φ = 83673374400.

The previous prime is 85497772799. The next prime is 85497772819. The reversal of 85497772813 is 31827779458.

It is a cyclic number.

It is not a de Polignac number, because 85497772813 - 2¹⁷ = 85497641741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85497772819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28150531 + ... + 28153567.

It is an arithmetic number, because the mean of its divisors is an integer number (5458556880).

Almost surely, 2^85497772813 is an apocalyptic number.

It is an amenable number.

85497772813 is a deficient number, since it is larger than the sum of its proper divisors (1839137267).

85497772813 is a wasteful number, since it uses less digits than its factorization.

85497772813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268.

The product of its digits is 23708160, while the sum is 61.

The spelling of 85497772813 in words is "eighty-five billion, four hundred ninety-seven million, seven hundred seventy-two thousand, eight hundred thirteen".