1661814825082 has 8 divisors (see below), whose sum is σ = 2495192728500. Its totient is φ = 830083915584.

The previous prime is 1661814825031. The next prime is 1661814825089. The reversal of 1661814825082 is 2805284181661.

It can be written as a sum of positive squares in 2 ways, for example, as 1649449607481 + 12365217601 = 1284309^2 + 111199^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1661814825089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411745957 + ... + 411749992.

Almost surely, 2^{1661814825082} is an apocalyptic number.

1661814825082 is a deficient number, since it is larger than the sum of its proper divisors (833377903418).

1661814825082 is a wasteful number, since it uses less digits than its factorization.

1661814825082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823496960.

The product of its (nonzero) digits is 1474560, while the sum is 52.

The spelling of 1661814825082 in words is "one trillion, six hundred sixty-one billion, eight hundred fourteen million, eight hundred twenty-five thousand, eighty-two".