61740775287831 has 16 divisors (see below), whose sum is σ = 82972099617408. Its totient is φ = 40836214658400.

The previous prime is 61740775287809. The next prime is 61740775287869. The reversal of 61740775287831 is 13878257704716.

61740775287831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61740775287831 - 2¹⁹ = 61740774763543 is a prime.

It is a super-2 number, since 2×61740775287831² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61740775287871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153642825 + ... + 154044146.

It is an arithmetic number, because the mean of its divisors is an integer number (5185756226088).

Almost surely, 2^{61740775287831} is an apocalyptic number.

61740775287831 is a deficient number, since it is larger than the sum of its proper divisors (21231324329577).

61740775287831 is a wasteful number, since it uses less digits than its factorization.

61740775287831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307687502.

The product of its (nonzero) digits is 110638080, while the sum is 66.

The spelling of 61740775287831 in words is "sixty-one trillion, seven hundred forty billion, seven hundred seventy-five million, two hundred eighty-seven thousand, eight hundred thirty-one".