1974286785725 has 6 divisors (see below), whose sum is σ = 2448115614330. Its totient is φ = 1579429428560.

The previous prime is 1974286785689. The next prime is 1974286785733. The reversal of 1974286785725 is 5275876824791.

It can be written as a sum of positive squares in 3 ways, for example, as 20433558916 + 1953853226809 = 142946^2 + 1397803^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1974286785725 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39485735690 + ... + 39485735739.

It is an arithmetic number, because the mean of its divisors is an integer number (408019269055).

Almost surely, 2^{1974286785725} is an apocalyptic number.

It is an amenable number.

1974286785725 is a deficient number, since it is larger than the sum of its proper divisors (473828828605).

1974286785725 is an equidigital number, since it uses as much as digits as its factorization.

1974286785725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78971471439 (or 78971471434 counting only the distinct ones).

The product of its digits is 474163200, while the sum is 71.

The spelling of 1974286785725 in words is "one trillion, nine hundred seventy-four billion, two hundred eighty-six million, seven hundred eighty-five thousand, seven hundred twenty-five".