1851406520896 has 63 divisors (see below), whose sum is σ = 3693057449913. Its totient is φ = 920897395200.

The previous prime is 1851406520869. The next prime is 1851406520921. The reversal of 1851406520896 is 6980256041581.

The square root of 1851406520896 is 1360664.

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

It can be written as a sum of positive squares in only one way, i.e., 1556166431296 + 295240089600 = 1247464^2 + 543360^2 .

It is a super-2 number, since 2×1851406520896² (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, 3080542996 + ... + 3080543596.

Almost surely, 2^{1851406520896} is an apocalyptic number.

1851406520896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1851406520896 is the 1360664-th square number.

It is an amenable number.

1851406520896 is a deficient number, since it is larger than the sum of its proper divisors (1841650929017).

1851406520896 is an frugal number, since it uses more digits than its factorization.

1851406520896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 1851406520896 in words is "one trillion, eight hundred fifty-one billion, four hundred six million, five hundred twenty thousand, eight hundred ninety-six".