1540056061 has 4 divisors (see below), whose sum is σ = 1630647612. Its totient is φ = 1449464512.

The previous prime is 1540056059. The next prime is 1540056071. The reversal of 1540056061 is 1606500451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1606500451 = 593 ⋅2709107.

It can be written as a sum of positive squares in 2 ways, for example, as 1290605625 + 249450436 = 35925^2 + 15794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540056061 - 2¹ = 1540056059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540056071) 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, 45295750 + ... + 45295783.

It is an arithmetic number, because the mean of its divisors is an integer number (407661903).

Almost surely, 2^1540056061 is an apocalyptic number.

It is an amenable number.

1540056061 is a deficient number, since it is larger than the sum of its proper divisors (90591551).

1540056061 is an equidigital number, since it uses as much as digits as its factorization.

1540056061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90591550.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1540056061 is about 39243.5480174767. The cubic root of 1540056061 is about 1154.8143629489.

The spelling of 1540056061 in words is "one billion, five hundred forty million, fifty-six thousand, sixty-one".