137892561985 has 8 divisors (see below), whose sum is σ = 165474219240. Its totient is φ = 110311953024.

The previous prime is 137892561977. The next prime is 137892562001. The reversal of 137892561985 is 589165298731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34473720241 + 103418841744 = 185671^2 + 321588^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 137892561985 - 2³ = 137892561977 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64261 + ... + 529069.

It is an arithmetic number, because the mean of its divisors is an integer number (20684277405).

Almost surely, 2^137892561985 is an apocalyptic number.

It is an amenable number.

137892561985 is a deficient number, since it is larger than the sum of its proper divisors (27581657255).

137892561985 is an equidigital number, since it uses as much as digits as its factorization.

137892561985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524147.

The product of its digits is 32659200, while the sum is 64.

The spelling of 137892561985 in words is "one hundred thirty-seven billion, eight hundred ninety-two million, five hundred sixty-one thousand, nine hundred eighty-five".