85764305821780 has 48 divisors (see below), whose sum is σ = 185917399395840. Its totient is φ = 33198636643200.

The previous prime is 85764305821769. The next prime is 85764305821783. The reversal of 85764305821780 is 8712850346758.

It is a super-2 number, since 2×85764305821780² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85764305821783) 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, 46860075 + ... + 48655885.

It is an arithmetic number, because the mean of its divisors is an integer number (3873279154080).

Almost surely, 2^{85764305821780} is an apocalyptic number.

It is an amenable number.

85764305821780 is an abundant number, since it is smaller than the sum of its proper divisors (100153093574060).

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

85764305821780 is a wasteful number, since it uses less digits than its factorization.

85764305821780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872880 (or 1872878 counting only the distinct ones).

The product of its (nonzero) digits is 90316800, while the sum is 64.

The spelling of 85764305821780 in words is "eighty-five trillion, seven hundred sixty-four billion, three hundred five million, eight hundred twenty-one thousand, seven hundred eighty".