1610742681 has 12 divisors (see below), whose sum is σ = 2338685908. Its totient is φ = 1068263424.

The previous prime is 1610742677. The next prime is 1610742697. The reversal of 1610742681 is 1862470161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 505845081 + 1104897600 = 22491^2 + 33240^2 .

It is not a de Polignac number, because 1610742681 - 2² = 1610742677 is a prime.

It is a super-2 number, since 2×1610742681² = 5188983968790135522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1610742181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461920 + ... + 465393.

Almost surely, 2^1610742681 is an apocalyptic number.

It is an amenable number.

1610742681 is a deficient number, since it is larger than the sum of its proper divisors (727943227).

1610742681 is a wasteful number, since it uses less digits than its factorization.

1610742681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927512 (or 927509 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1610742681 is about 40134.0588652581. The cubic root of 1610742681 is about 1172.2189077384.

The spelling of 1610742681 in words is "one billion, six hundred ten million, seven hundred forty-two thousand, six hundred eighty-one".