85687651433 has 2 divisors, whose sum is σ = 85687651434. Its totient is φ = 85687651432.

The previous prime is 85687651369. The next prime is 85687651477. The reversal of 85687651433 is 33415678658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46921191769 + 38766459664 = 216613^2 + 196892^2 .

It is a cyclic number.

It is not a de Polignac number, because 85687651433 - 2⁶ = 85687651369 is a prime.

It is not a weakly prime, because it can be changed into another prime (85687651493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42843825716 + 42843825717.

It is an arithmetic number, because the mean of its divisors is an integer number (42843825717).

Almost surely, 2^85687651433 is an apocalyptic number.

It is an amenable number.

85687651433 is a deficient number, since it is larger than the sum of its proper divisors (1).

85687651433 is an equidigital number, since it uses as much as digits as its factorization.

85687651433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14515200, while the sum is 56.

The spelling of 85687651433 in words is "eighty-five billion, six hundred eighty-seven million, six hundred fifty-one thousand, four hundred thirty-three".