85811520540450 has 48 divisors (see below), whose sum is σ = 212813333449920. Its totient is φ = 22882990153920.

The previous prime is 85811520540419. The next prime is 85811520540547. The reversal of 85811520540450 is 5404502511858.

It is a self number, because there is not a number n which added to its sum of digits gives 85811520540450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49134816 + ... + 50851284.

It is an arithmetic number, because the mean of its divisors is an integer number (4433611113540).

Almost surely, 2^{85811520540450} is an apocalyptic number.

85811520540450 is an abundant number, since it is smaller than the sum of its proper divisors (127001812909470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85811520540450 is a wasteful number, since it uses less digits than its factorization.

85811520540450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049771 (or 2049766 counting only the distinct ones).

The product of its (nonzero) digits is 1280000, while the sum is 48.

The spelling of 85811520540450 in words is "eighty-five trillion, eight hundred eleven billion, five hundred twenty million, five hundred forty thousand, four hundred fifty".