1860201387664 has 45 divisors (see below), whose sum is σ = 3618200202267. Its totient is φ = 926486380032.

The previous prime is 1860201387647. The next prime is 1860201387677. The reversal of 1860201387664 is 4667831020681.

The square root of 1860201387664 is 1363892.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 905656755600 + 954544632064 = 951660^2 + 977008^2 .

It is a super-2 number, since 2×1860201387664² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1903992744 + ... + 1903993720.

Almost surely, 2^{1860201387664} is an apocalyptic number.

1860201387664 is the 1363892-nd square number.

It is an amenable number.

1860201387664 is a deficient number, since it is larger than the sum of its proper divisors (1757998814603).

1860201387664 is an frugal number, since it uses more digits than its factorization.

1860201387664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 1860201387664 in words is "one trillion, eight hundred sixty billion, two hundred one million, three hundred eighty-seven thousand, six hundred sixty-four".