285720147288770 has 64 divisors (see below), whose sum is σ = 518055364749312. Its totient is φ = 113454095040000.

The previous prime is 285720147288721. The next prime is 285720147288781. The reversal of 285720147288770 is 77882741027582.

It is a super-2 number, since 2×285720147288770² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 285720147288770.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18564097775 + ... + 18564113165.

It is an arithmetic number, because the mean of its divisors is an integer number (8094615074208).

Almost surely, 2^{285720147288770} is an apocalyptic number.

285720147288770 is a deficient number, since it is larger than the sum of its proper divisors (232335217460542).

285720147288770 is a wasteful number, since it uses less digits than its factorization.

285720147288770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25827.

The product of its (nonzero) digits is 196689920, while the sum is 68.

The spelling of 285720147288770 in words is "two hundred eighty-five trillion, seven hundred twenty billion, one hundred forty-seven million, two hundred eighty-eight thousand, seven hundred seventy".