1501661061 has 12 divisors (see below), whose sum is σ = 2169703692. Its totient is φ = 1000813056.

The previous prime is 1501661059. The next prime is 1501661071. The reversal of 1501661061 is 1601661051.

It can be written as a sum of positive squares in 2 ways, for example, as 1025984961 + 475676100 = 32031^2 + 21810^2 .

It is not a de Polignac number, because 1501661061 - 2¹ = 1501661059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1501661041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10405 + ... + 55781.

It is an arithmetic number, because the mean of its divisors is an integer number (180808641).

Almost surely, 2^1501661061 is an apocalyptic number.

It is an amenable number.

1501661061 is a deficient number, since it is larger than the sum of its proper divisors (668042631).

1501661061 is a wasteful number, since it uses less digits than its factorization.

1501661061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49060 (or 49057 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 1501661061 is about 38751.2717339702. The cubic root of 1501661061 is about 1145.1366289417.

The spelling of 1501661061 in words is "one billion, five hundred one million, six hundred sixty-one thousand, sixty-one".