61074520387 has 4 divisors (see below), whose sum is σ = 61075129120. Its totient is φ = 61073911656.

The previous prime is 61074520363. The next prime is 61074520411. The reversal of 61074520387 is 78302547016.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (61074520363) and next prime (61074520411).

It is a cyclic number.

It is not a de Polignac number, because 61074520387 - 2¹⁹ = 61073996099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61074520357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114312 + ... + 367717.

It is an arithmetic number, because the mean of its divisors is an integer number (15268782280).

Almost surely, 2^61074520387 is an apocalyptic number.

61074520387 is a deficient number, since it is larger than the sum of its proper divisors (608733).

61074520387 is a wasteful number, since it uses less digits than its factorization.

61074520387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608732.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 61074520387 in words is "sixty-one billion, seventy-four million, five hundred twenty thousand, three hundred eighty-seven".