1851075778162 has 16 divisors (see below), whose sum is σ = 2991117554712. Its totient is φ = 854080318080.

The previous prime is 1851075778157. The next prime is 1851075778171. The reversal of 1851075778162 is 2618775701581.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1329660365881 + 521415412281 = 1153109^2 + 722091^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1851075778097 and 1851075778106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10844889 + ... + 11014252.

Almost surely, 2^{1851075778162} is an apocalyptic number.

1851075778162 is a deficient number, since it is larger than the sum of its proper divisors (1140041776550).

1851075778162 is a wasteful number, since it uses less digits than its factorization.

1851075778162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21862413.

The product of its (nonzero) digits is 6585600, while the sum is 58.

The spelling of 1851075778162 in words is "one trillion, eight hundred fifty-one billion, seventy-five million, seven hundred seventy-eight thousand, one hundred sixty-two".