61561840288234 has 32 divisors (see below), whose sum is σ = 108491145416640. Its totient is φ = 25829060457600.

The previous prime is 61561840288231. The next prime is 61561840288237. The reversal of 61561840288234 is 43288204816516.

It is an interprime number because it is at equal distance from previous prime (61561840288231) and next prime (61561840288237).

It is not an unprimeable number, because it can be changed into a prime (61561840288231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2345989 + ... + 11341399.

It is an arithmetic number, because the mean of its divisors is an integer number (3390348294270).

Almost surely, 2^{61561840288234} is an apocalyptic number.

61561840288234 is a deficient number, since it is larger than the sum of its proper divisors (46929305128406).

61561840288234 is a wasteful number, since it uses less digits than its factorization.

61561840288234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9019366.

The product of its (nonzero) digits is 17694720, while the sum is 58.

The spelling of 61561840288234 in words is "sixty-one trillion, five hundred sixty-one billion, eight hundred forty million, two hundred eighty-eight thousand, two hundred thirty-four".